medicalforums, you are trying to add your link in the wrong place, the link does not go in the nav buttons bar code.
in your navbar find:
Code:
<tr><td class="vbmenu_option"><a href="memberlist.php$session[sessionurl_q]">$vbphrase[members_list]</a></td></tr>
</if>
and put your new link under that eg:
you could add:
Code:
<if condition="$show['memberslist']">
<tr><td class="vbmenu_option"><a href="LINK URL">LINK NAME</a></td></tr>
</if>