Help - Fix login box problems.

[unenergizer]

On my site (displayed in signature) I am using a login box in the header. This login is displayed in our forum directory and our home directory (for vba cmps).

Example:
/portal.php (home directory)
/forum/index.php

Now you are able to login successfully in the forum directory, but in our home directory it brings you to an error 404 page. When logging in from portal.php the redirect is:

/login.php?do=login

This should be:

/forum/login.php?do=login

Here is my source for login code in the template (note this is not all the header source):

                               <table cellpadding="0" cellspacing="0" border="0">
                                      <tr>
                                          <td><img src="$stylevar[imgdir_misc]/login_lc.png" alt="" width="6" /></td>
                                          <td style="background: url($stylevar[imgdir_misc]/login_x.png) repeat-x bottom;">
                                              <table cellpadding="0" cellspacing="0">
                                                     <tr>
                                                         <if condition="$show['member']">
                                                             <td class="" valign="top" nowrap="nowrap">
		                                                 <div class="smallfont">
			                                              <strong><phrase 1="$bbuserinfo[username]">$vbphrase[welcome_x]</phrase></strong><br />
			                                              <phrase 1="$pmbox[lastvisitdate]" 2="$pmbox[lastvisittime]">$vbphrase[last_visited_x_at_y]</phrase>
			                                              <if condition="$show['pmstats']"><br /><phrase 1="$vbphrase[unread_x_nav_compiled]" 2="$vbphrase[total_x_nav_compiled]" 3="$session[sessionurl_q]">$vbphrase[private_messages_nav]</phrase></if>
			                                              <if condition="$show['pmwarning']"><br /><strong><phrase 1="$vbphrase[pmpercent_nav_compiled]">$vbphrase[your_pm_box_is_x_full]</phrase></strong></if>
		                                                 </div>
                                                             </td>
                                                	<else />
                                                		<td class="" nowrap="nowrap" style="padding:0px">
                                                		<!-- login form -->
                                                		<form action="login.php?do=login" method="post" onsubmit="md5hash(vb_login_password, vb_login_md5password, vb_login_md5password_utf, $show[nopasswordempty])">
                                                		<script type="text/javascript" src="clientscript/vbulletin_md5.js?v=$vboptions[simpleversion]"></script>
                                                		<table cellpadding="0" cellspacing="$stylevar[formspacer]" border="0">
                                                		<tr>
                                                			<td><input type="text" class="bginput" style="font-size: 11px" value="Username" onfocus="this.value=''" name="vb_login_username" id="navbar_username" size="10" accesskey="u" tabindex="101" value="$vbphrase[username]" onfocus="if (this.value == '$vbphrase[username]') this.value = '';" /></td>
                                                			<td><input type="password" class="bginput" style="font-size: 11px" value="Password" onfocus="this.value=''" name="vb_login_password" id="navbar_password" size="10" tabindex="102" /></td>
                                                			<td><input type="submit" class="button" value="$vbphrase[log_in]" tabindex="104" title="$vbphrase[enter_username_to_login_or_register]" accesskey="s" /></td>
                                                			<td class="smallfont" nowrap="nowrap"><label for="cb_cookieuser_navbar"><input type="checkbox" name="cookieuser" value="1" tabindex="103" id="cb_cookieuser_navbar" accesskey="c" />$vbphrase[remember_me]</label></td>
                                                		</tr>
                                                		</table>
                                                		<input type="hidden" name="s" value="$session[sessionhash]" />
                                                		<input type="hidden" name="do" value="login" />		
                                                		<input type="hidden" name="vb_login_md5password" />
                                                		<input type="hidden" name="vb_login_md5password_utf" />
                                                		</form>
                                                		<!-- / login form -->
                                                		</td>
                                                	</if>	
                                                </tr>
                                                </table>
                                          </td>
                                          <td align="$stylevar[right]"><img src="$stylevar[imgdir_misc]/login_rc.png" alt="" width="22"/></td
                                      </tr>
                               </table>

I have tried editing:

action="login.php?do=login"

to

action="http://www.completegfx.com/forum/login.php?do=login"

Now, the end result with this method logs the user in (or shows the welcome screen) and when redirected back to the forum, the user is logged out again. This happens in both the home and forum directory.

WRAP UP:
I need to fix the login box so it logs the user in on both directories.

Hope someone can help out.