I just had a quick look (seeing as I set it up for you a while back), and it looks like you're using the wrong tag
<li><a href="<%db_cgi_url%>/modify.cgi<%if t%>?t=<%t%><%endif%>">Modify a Link</a><br />Change a link in the directory that you submitted.<br /> </li>
The part in red should be:
<%db_cgi_url%> won't work as you are expectig in GComm, as its a seperate script :)
Want to give me something back for my help? Please see my Amazon Wish List
GLinks ULTRA Package | GLinks ULTRA Package PRO
Links SQL Plugins | Website Design and SEO | UltraNerds | ULTRAGLobals Plugin | Pre-Made Template Sets | FREE GLinks Plugins!