Ok, try reverting your navbar back to what you posted originally, and then try this for your header...
Code:
<!-- logo -->
<a name="top"></a>
<table border="0" width="$stylevar[outertablewidth]" cellpadding="0" cellspacing="0" align="center" class="header_bg">
<tr>
<td align="$stylevar[left]" valign="top" height="112"><a href="$vboptions[forumhome].php$session[sessionurl_q]"><img src="$stylevar[titleimage]" border="0" alt="$vboptions[bbtitle]" /></a></td>
<td align="$stylevar[right]">
$header_advertisement
<!-- banners -->
</td>
</tr>
<tr>
<td height="34" colspan="2">
<!-- nav buttons bar -->
<div align="center">
<table cellpadding="$stylevar[cellpadding]" cellspacing="0" border="0" width="100%" align="center">
<tr align="center">
<if condition="$show['member']">
<td class="nav_menu_control"><a href="usercp.php$session[sessionurl_q]">$vbphrase[user_cp]</a></td>
</if>
<if condition="$show['registerbutton']">
<td class="nav_menu_control"><a href="register.php$session[sessionurl_q]" rel="nofollow">$vbphrase[register]</a></td>
</if>
<td class="nav_menu_control"><a href="faq.php$session[sessionurl_q]" accesskey="5">$vbphrase[faq]</a></td>
<td class="nav_menu_control"><a href="memberlist.php$session[sessionurl_q]">$vbphrase[members_list]</a></td>
<td class="nav_menu_control"><a href="calendar.php$session[sessionurl_q]">$vbphrase[calendar]</a></td>
<if condition="$show['popups']">
<if condition="$show['searchbuttons']">
<if condition="$show['member']">
<td class="nav_menu_control"><a href="search.php?$session[sessionurl]do=getnew" accesskey="2">$vbphrase[new_posts_nav]</a></td>
<else />
<td class="nav_menu_control"><a href="search.php?$session[sessionurl]do=getdaily" accesskey="2">$vbphrase[todays_posts]</a></td>
</if>
<td id="navbar_search" class="nav_menu_control"><a href="search.php$session[sessionurl_q]" accesskey="4" rel="nofollow">$vbphrase[search]</a> <if condition="$show['quicksearch']"><script type="text/javascript"> vbmenu_register("navbar_search"); </script></if></td>
<td id="forumjump" class="vbmenu_control"><a href="#forumjump">Forum Jump</a> <script type="text/javascript"> vbmenu_register("forumjump"); </script></td>
</if>
<if condition="$show['member']">
<td id="usercptools" class="nav_menu_control"><a href="$show[nojs_link]#usercptools">$vbphrase[quick_links]</a> <script type="text/javascript"> vbmenu_register("usercptools"); </script></td>
</if>
<else />
<if condition="$show['searchbuttons']">
<td class="nav_menu_control"><a href="search.php$session[sessionurl_q]" accesskey="4">$vbphrase[search]</a></td>
<if condition="$show['member']">
<td class="nav_menu_control"><a href="search.php?$session[sessionurl]do=getnew" accesskey="2">$vbphrase[new_posts_nav]</a></td>
<else />
<td class="nav_menu_control"><a href="search.php?$session[sessionurl]do=getdaily" accesskey="2">$vbphrase[todays_posts]</a></td>
</if>
</if>
<td class="nav_menu_control"><a href="forumdisplay.php?$session[sessionurl]do=markread" rel="nofollow">$vbphrase[mark_forums_read]</a></td>
<if condition="$show['member']">
<td class="nav_menu_control"><a href="#" onclick="window.open('misc.php?$session[sessionurl]do=buddylist&focus=1','buddylist','statusbar=no,menubar=no,toolbar=no,scrollbars=yes,resizable=yes,width=250,height=300'); return false;">$vbphrase[open_buddy_list]</a></td>
</if>
</if>
<if condition="$show['member']">
<td class="nav_menu_control"><a href="login.php?$session[sessionurl]do=logout&logouthash=$bbuserinfo[logouthash]" onclick="return log_out()">$vbphrase[log_out]</a></td>
</if>
</tr>
</table>
</div>
<!-- / nav buttons bar -->
</td></tr>
</table>
<!-- /logo -->
<div class="vbmenu_popup" id="forumjump_menu" style="display:none">
<table cellpadding="2" cellspacing="1" border="0">
<tr>
<td> <!-- This will begin a new column -->
<table valign="top" width="200" cellpadding="2" cellspacing="1" border="0">
<tr><td class="tcat" onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Category</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
</table>
<table width="200" cellpadding="2" cellspacing="1" border="0">
<tr><td class="tcat" onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Category</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
</table>
<table width="200" cellpadding="2" cellspacing="1" border="0">
<tr><td class="tcat" onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Category</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
</table>
</td>
<td> <!-- This will begin a new column -->
<table width="200" cellpadding="2" cellspacing="1" border="0">
<tr><td class="tcat" onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Category</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
</table>
</td>
<td> <!-- This will begin a new column -->
<table width="200" cellpadding="2" cellspacing="1" border="0">
<tr><td class="tcat" onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Category</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
</table>
<table width="200" cellpadding="2" cellspacing="1" border="0">
<tr><td class="tcat" onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Category</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
<tr><td onclick="window.location='http://www.yourforum.com/forumdisplay.php?f='" style="cursor:pointer; background-color:#DEE6EF" onmouseover="this.style.backgroundColor='#BAD2F0';" onmouseout="this.style.backgroundColor='#DEE6EF';">Forum Name</td></tr>
</table>
</td>
<td>
</tr>
</table>
</div>
<!-- content table -->
$spacer_open
$leftcolumn_advertisement
$_phpinclude_output
$welcomeheaders