Re-check your firewall configuration. You don't need to turn it off, just configure it for LW. Don't have 2 firewalls running at once. Do the port test. Instructions for all here:
http://www.gnutellaforums.com/showth...threadid=50390

Try deleting your LW preferences while LW's closed. Try reinstalling Java using the "offline"installer. Instructions for all here:
http://www.gnutellaforums.com/showth...threadid=36420

You might have probs with an internal firewall in your modem/router(info in 1st link). What's your set up? (see 1st link for info needed)