can you post the specs of your comp - OS, RAM, internet connection details etc. it'll enable people to help you.
have you looked at the official limewire site for firewall configuration and done it accordingly?limewire firewall help
you could try searching and reading some of the existing threads and acting on the suggestions listed there.http://www.gnutellaforums.com/showth...threadid=49103 this is a good place to start, look at posts by lord of the rings, specifically the bit about changing ports.
hope this helps.