You must have Limewire completely uninstalled before installing Java.
The following thread should help. If you follow the 2 links in Grandpas post and still have problems .. read the rest of the post. Let us know how you get on
here was a better thread ...but for the life of me I can't find it right now
Help: Tried both Java 1.4.2 & 1.5 yet Limewire is laggy