I suppose you must have checked the "It's them damn ISPs again..." lead, huh?
I'm also guessing that you know how to properly port-forward (just in case:
http://portforward.com/).
You can try doing the following: go to Limewire, click Tools, Options and then click Advanced. The click the Firewall option and change the port there (here is a list of ports by ursula:
http://www.gnutellaforums.com/showth...threadid=24523)