What's your setup?
OS (ok, that's XP)
LW & Java version (Help > about LW & it'll tell you)
Modem/router brand & model
Connection type (cable, dial-up etc)
Where you connect from (home, work etc)
Firewalls (ok, just XP)

There are often internal firewalls in modems/routers so this might be a problem.

If your router uses UPnP, make sure it's on in the router & LW (tools > options > advanced > firewall config. Tick 'use UPnP & apply). Info about UPnP & routers etc here:
http://www.gnutellaforums.com/showth...threadid=51357