Read the sticky at the top of the page. The first part "... check here first". Make sure you're only running 1 firewall & that it's configured properly. Do the port test, see what result you get.

If your router supports UPnP, enable it within the router & also within LW's firewall config option. Read all the stuff about internal firewalls within modems/routers. If your model has an internal firewall, you might need to port forward.