1st see Connection problems? Check here first! (click on link) re: setting up your firewall to configure for LW. Also to enable UPnP for your router/modem. I haven't heard of either your isp or wireless device. But all wireless devices use NAT firewalls, so if it has UPnP capability, this needs to be enabled. If it doesn't, then manual port forwarding would be necessary. See the appropriate sections in the link I gave.

Do this simple test for us. Using your browser go here: http://www3.limewire.com:6346/ The page should say 'Your test worked!'. What happens when you go there?