For the new version LW, it's a good idea to delete your previous LW preferences folder.

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.)
http://www.gnutellaforums.com/genera...der-vista.html
Oh .. depending on your firewall type, when updating LW, you may need to remove the old rule & re-add a fresh firewall rule for LW.