How are you application(s) packaged? Are the EJB jar and the war file, two separate applications or are they part of an ear file? Also, do have a look at this wiki page (if you havent already seen that ) http://wiki.jboss.org/wiki/Wiki.jsp?page=ClassCastExceptions Additionally, in your code try using some debug statements like: // lookup you ejb | Object obj = ctx.lookup("....."); | // i guess this is going to output Proxy$ or something similar | System.out.println("Returned obj is of class: " + obj.getClass()); | | // now lets see whether we can narrow that object | if (obj instanceof MyHome ) { | //where MyHome is the class name of the bean's home | System.out.println("Everything looks fine. Lets do the PortableRemoteObject.narrow"); | MyHome home = (MyHome) PortableRemoteObject.narrow(obj,MyHome.class); | System.out.println("Success"); | } else { | System.out.println("Most probably a classloader issue"); | System.out.println("Object returned was loaded by: " + obj.getClass().getClassLoader()); | System.out.println("MyHome class in the servlet was loaded by: " + MyHome.class.getClassLoader()); | } | | | | P.S.: I havent tried this code, you might have to do any changes that are required. But it might just give you some options to try out. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4050599#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...