I'm having the same problem and I see other people reporting that my isp (Verizon FIOS) is possibly blocking the ports.

I have tried changing both ports and different combinations but it's not working. I have a wireless router but I have my limewire pc as the DMZ so that should make the router transparent from what i understand.

It seems to me if they are just blocking ports I should be able to get around it by changing the ports but I can't.

I've found bearshare to work some without changing anything but not well.

I have windows xp sp2, amd 1.7GHz, 512 ram, nothing funny installed that I know of.

Any suggestions?