Hi,
I suppose you have the same problem as I did (one of the 3 cases defined in JCRE 2.2.1). I had problems with static object, referenced from persistent applets variable. Look at this topic:
http://forum.java.sun.com/thread.jspa?threadID=5170995&messageID=9659536#9659536
Also try delete -r command in JCOP shell. It mus work, because it deletes all related applets, packages and their objects at once.
Best regards,
Eve