Hi all! I use jboss-4.0.5.GA and EJB3.0 I write two beans that have same name (called BeanA). Example: anonymous wrote : Inside package: my.com has a bean called BeanA and exported to "my.jar" | Inside package: john.com has a bean called Bean A and exported to "john.jar" I deployed two jars follow order: my.jar is first, and john.jar is second. Deploying two jars (my.jar and john.jar) is Ok! On the client side, I write two clients. Client1 use my.jar and client2 use john.jar import my.com.BeanA; | ... | Context ctx = new InitialContext(); | BeanA b = (BeanA)ctx.lookup(BeanABean/remote); | b.add(1,2); ---> all works are ok! But on the Client2: import john.com.BeanA; | .. | Context ctx = new InitialContext(); | BeanA b = (BeanA)ctx.lookup(BeanABean/remote); | b.add(1,2); And then, Client2 received error : Exception in thread "main" java.lang.ClassCastException: $Proxy0 | at client.ClientTest1.main(ClientTest1.java:18) at line: BeanA b = (BeanA)ctx.lookup(BeanABean/remote); I think that my.jar is first deployed so my works are success! And JBoss not recognize john.jar when it deployed after, so my works are fail ! Have ideas about this problem? Please guide to me! Thanks very much. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4082817#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...