anonymous wrote : 2008-02-28 21:18:13,952 DEBUG [org.jboss.invocation.http.servlet.InvokerServlet] Invoke threw exception | java.io.InvalidClassException: org.jboss.security.plugins.JBossSecurityContext; class invalid for deserialization Did you use the same JBoss jar files which are on the server? Also, make sure you are using the same version of Java on both the server and the client. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4133150#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...