Try entering the following in the connections window (make sure the port is set to 6346) . Click on Add and type them in at the bottom:

router.limewire.com
public.bearshare.net
connect1.bearshare.net
connect2.bearshare.net
connect3.bearshare.net
connect1.gnutellanet.com
connect2.gnutellanet.com
connect3.gnutellanet.com
connect4.gnutellanet.com
gnutella.hostscache.com
gnet2.ath.cx
gnotella.fileflash.com
gnet2.ath.cx
gnutella-again.hostscache.com
gnutella.hostscache.com

You can also enter them in the preferences in Tools>Options>Connections.