Hmmmm If you have done Everything LOTR has suggested.

You might check your firewall configurations just to make sure that the settings haven't changed.

If you had to do a manual port forward in LW make sure your settings there are still correct.

The last thing is check with your Internet Service Provider and see if they are blocking/filtering the ports LimeWire uses. Usually ports 6346 or 6348. You can also ask them if they are filtering/blocking p2p applications/programs.

Of course your Internet Service may deny blocking/filtering p2p applications or the ports used by them.