Well if deleting the
.limewire folder didn't fix the problem which is found here:
Windows 98 / ME: Your .limewire folder is in "C:\My Documents"
Windows NT 4.0 / 2000 / XP: Your .limewire folder is in "C:\Documents and Settings\Username"
Description here: Try deleting your LW Preferences folder whilst LW is closed; instructions here:
Fixes for Limewire
Then try uninstalling Java & re-installing it. Downld the Java installer & save it to your computer before installing. Don't install over the net. You can find a Java link from the link above.