Providing you see all green/blue connection bars in the bottom left corner, try these fixes.

1. In LW go tools > options > searching > basic & check whether the 'show license warning' box is ticked. If it does, untick it > Apply > ok...see if that makes any difference.

2. Problems with the search

3. Delete LW's preferences folder when LW's properly closed.
http://www.gnutellaforums.com/genera...der-vista.html
This will change all of your settings within LW's options, you'll have to go back through afterwards & reset things.