I know it will not make MacPhex users happier, but if you've got LimeWire you should follow the instructions available on LimeWire site. The text goeas as follows:

>>One of our machines is down. Enable View -> Connections, go to the Connections tab and type in 208.239.76.100. Click add. If you have the latest version 2.5.5 you should never have these problems again after connecting once and cleanly shutting down after a while.<<

So, enable Coonections, enter the numbers, click add. Quit LimeWire and launch it again. If it does not work shut the program again, and then launch it. It will work.

Piotr