You might cure this by deleting Limewires Preference folder. You will of course loose all your settings, and share details and you must do this with Limewire FULLY closed
See
http://www.gnutellaforums.com/showth...=fixes+working
particularly no. 2 , but theres lots of good stuff there
I'm assuming you have done a thorough virus scan.
Let us know how you get on.