This Java Class error has appeared in a more recent post by another unregistered person - it could be the same question from the same person - its hard to tell.
It would make life much easier if you would register, then we can see if it's 2 people with the same problem or 1 person posting again with the same problem.
Anyway - see TruStars response - go to this thread:-
http://www.gnutellaforums.com/showth...&threadid=3058