How about the connection port. Try that also ... but as suggested you may need to port forward for that port.

BTW after changing the listening port did the brick wall disappear from the blue world icon?

BTW did you try deleting your LW Preferences folder whilst LW is closed; instructions here: Point #2 & 3 in Fixes for Limewire (sample image included at bottom of page.) Make sure you check both locations!!!

But if you do this, you will need to reset all your LW options & settings such as your Port Forward settings, etc.