Read through this thread & follow the advice for configuring firewall. If your router uses UPnP, make sure it's on within the router & LW (tools > options > advanced > firewall config > tick use UPnP & apply).
http://www.gnutellaforums.com/showth...threadid=51357

Make sure you're only running 1 firewall.
Do the port test & see what result you get.