Maybe the port forward has gone haywire....
Just check that the numbers you entered into the manual port forward box and the listening port box are exactly the same and also the number you choose when you port forwarded...
Also here are the instructions for your router and limewire you can always just double check that all has been configured properly...
Port Forwarding for the Linksys BEFSR41 Ver 3 (this is for v3,v4 and v5)