Try deleting your LW Preferences folder whilst LW is
closed; instructions here:
Point #3 in Fixes for Limewire (sample image included at bottom of page.) Oops .. Vista instructions here
http://www.gnutellaforums.com/genera...der-vista.html
But I must point out .. many of those results you might have been getting with LW 4.18 were probably spam .. which LW 5 auto-filters out .. many at least.