Hi, I want to make two different versions of jboss talk to each other. According to http://wiki.jboss.org/wiki/JBossVersionCompatibilityMatrix I should be able to do what I want: I have a legacy ejb 2.x application deployed on a jboss 4.0.2 and I have a newly developed ejb3 application deployed on a jboss 4.2.0. The calls from 4.2.0 to 4.0.2 work fine. But the calls from the 4.0.2 => 4.2.0 direction run into trouble. The ejb3 application offers a @RemoteHome interface for the legacy application as described here http://java.sun.com/mailers/techtips/enterprise/2007/TechTips_Feb07.html#1 Yet the lookup of the home interface in the legacy application fails with a ClassNotFoundException because the ProxyFactory creates an ejb3 specific proxy object: javax.naming.CommunicationException [Root exception is java.lang.ClassNotFoundException: org.jboss.ejb3.stateless.StatelessRemoteProxy (no security manager: RMI class loader disabled)] | at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:713) | at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:572) | The compatibility matrix I referred to above states that I "must use the legacy rmi invokers" to make this work. I have found no further documentation what these invokers are and how I configure my application to use them. What I have found are invoker-proxy-binding definitions in the standardjboss.xml deployed in my 4.2.0 jboss. There is for example: | <invoker-proxy-binding> | <name>stateless-rmi-invoker</name> | <invoker-mbean>jboss:service=invoker,type=unified</invoker-mbean> | <proxy-factory>org.jboss.proxy.ejb.ProxyFactory</proxy-factory> | ..... | Is this the right place to look for some reconfiguration? How would I need to change this for my application and how would I make the ProxyFactory return non-ejb3 specific proxy objects? I would be grateful for any hint in finding a solution for this, as I do not have the option of simply plugging some ejb3 classes into the 4.0.2 jboss. Bye S.Pieper View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4152392#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...