AOL, you lost me there. Many people complain about AOL. However, to all of a sudden stop working & not connect, sounds like an ISP issue.
However, 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.) Try opening again.
You didn't say which version of LW you have.