What happened when you did the port test here?
http://www3.limewire.com:6346

You could try changing to a higher port (recommended range between 49152 - 65535). See below for instructions. Don't forget, you'll also have to change the port number for Gnutella within the XP firewall.
http://www.gnutellaforums.com/showpo...56&postcount=6