Have a look through this thread. It's long & some of the posts are old, but you might find some help
http://www.gnutellaforums.com/showth...nnection+drops

also
http://www.gnutellaforums.com/showth...threadid=51480

If you don't find an answer, post back with your details

OS(Win XP etc)
LW & Java version (help > about LW & you'll see)
Firewall you're using
Modem/router brand & model
ISP
Connection type (DSL etc)
Where you connect from (home, school etc)
Are you sharing a connection with other computers
Is this your first try with LW