The test worked means that your ISP doesn't block the port LW is using. However XP has a built-in firewall. So, I assume that you see a brickwall in front of the small globe in the left bottom corner of the LW window.
To configurate the XP firewall go and read here:
http://www.gnutellaforums.com/showthread.php?t=51361
In case that this is not the issue, try to delete your " .limewire " preference folder (Point #2 & 3 in Fixes for Limewire).
http://www.gnutellaforums.com/showth...threadid=36420 