I've run into this problem a while ago. I don't recall how I solved this. (Just trying to recall ->) this is reported on on HS forum or it's JIRA (cannot access these sites at this moment to provide concrete points, servers overloaded?) and is caused by behind-the-scene casting against an unimplemented interface. That's all I recall. Search there, make a postback to Pete, please. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4121258#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...