Is your bean's interfaces (remote/local or localhome/remotehome) packaged in more than
one places(may be in the war and then in some jar). If yes, then remove it from the war
and maintain it in only one single jar file.
Also, have a look at:
http://wiki.jboss.org/wiki/Wiki.jsp?page=ClassCastExceptions
Specifically, have a look at the method of using JMX console mentioned in the above url.
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