Problemas jboss, ejb y corba

27 de Abril del 2008
hola me esta saliendo este error cuando ejecuto la clase cliente

Exception in thread "main" java.lang.ClassCastException
at Source)
at javax.rmi.PortableRemoteObject.narrow(Unknown Source)
at HelloClient.main(
Caused by: java.lang.ClassCastException: $Proxy0 cannot be cast to org.omg.CORBA.Object
... 3 more

la clase cliente es esta:

import javax.naming.Context;
import javax.naming.InitialContext;
import java.util.Properties;

* This class is an example of client code that invokes
* methods on a simple stateless session bean.
public class HelloClient {
public static void main(String[] args) throws Exception {
* Setup properties for JNDI initialization.
* These properties will be read in from
* the command line.
System.setSecurityManager(new java.rmi.RMISecurityManager());

Properties props = new Properties();
props.put("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory");
props.put("java.naming.factory.url.pkgs", "org.jboss.naming:org.jnp.interfaces");
props.put("java.naming.provider.url", "jnp://localhost:1099");
* Obtain the JNDI initial context.
* The initial context is a starting point for
* connecting to a JNDI tree. We choose our JNDI
* driver, the network location of the server, etc.
* by passing in the environment properties.
Context ctx = new InitialContext(props);

* Get a reference to the home object - the
* factory for Hello EJB Objects
Object obj = ctx.lookup("examples/ejb21/HelloHome");
* Home objects are RMI-IIOP objects, and so
* they must be cast into RMI-IIOP objects
* using a special RMI-IIOP cast.
* See Appendix A for more details on this.
HelloHome home = (HelloHome) javax.rmi.PortableRemoteObject.narrow( obj, HelloHome.class);
* Use the factory to create the Hello EJB Object
Hello hello = (Hello) home.create();
* Call the hello() method on the EJB object. The
* EJB object will delegate the call to the bean,
* receive the result, and return it to us.
* We then print the result to the screen.
* Done with EJB Object, so remove it.
* The container will destroy the EJB object.

de verdad ya no se cual es el error. He probado de todo y nada.

gracias de antemano.