Sorry for taking so long... A lot of sidetracking went on
I suspect a Java problem and suggest you reinstall Java. This is best done by uninstalling Limewire fully, along with the preference folder first. Full instructions are here
http://www.gnutellaforums.com/windows/36420-fixes-limewire-when-lw-isn-t-operating-should.html
Let us know if you need more help