Try to update your Java. Uninstall all Java versions on your computer, download the newest version for your OS from here (JRE offline installer):
http://java.sun.com/j2se/1.5.0/download.jsp
You might have to uninstall LW before doing so, then install Java, reboot and install LW again. See if that helps, and in case it doesn't, try to delete your Limewire preference folder as explained here (Point #2 & 3 in Fixes for Limewire)
http://www.gnutellaforums.com/showth...threadid=36420 