Have a look through this thread, it's full of connection info:
http://www.gnutellaforums.com/showth...threadid=51357

You can turn your firewall back on, just configure it to allow LW access (instructions in thread). Don't use 2 firewalls together, they'll interfere with each other. Pay attention to the section about UPnP. If your router uses UPnP you'll have to enable it within the device & also within LW (tools > options > advanced > firewall config. Tick 'use UPnP, now apply)