I have heard that a firewall in come cases can slow down p2p use, in almost all cases a firewall would totally block access for p2p if it were not configures to allow it access. It sounds like you need to configure LW properly: see the following links for suggestions & hints:
http://www.gnutellaforums.com/showth...5&pagenumber=1 http://www.gnutellaforums.com/showth...threadid=27036 Search & dwnld techniques (hints)