If all your software firewalls are disabled then they may only be part of the reason or not a part of the problem at all.

My recommendation would be to forward a port. See instructions under Thomson-Alcatel at far right column here http://www.portforward.com/routers.htm & after finding your model, click on it & look for LimeWire on the list. The other alternative is to telnet into your device & see whether UPnP (universal plug & play) is an option & to enable it. This will by-pass the need for port forwarding.

BTW you may not have noticed the brick wall before when using the other softw FW's.