Calling MessageDrivenBean from another JBOSS-Server

[nib]

Hi,
I have one SessionBean (Stateless) and i want to call a messagedrivenbean from another server. But I Have the following Problem:

INFO [STDOUT] javax.naming.NoInitialContextException: Cannot instantiate class: org.jboss.naming:org.jnp.interfaces [Root exception is java.lang.ClassNotFoundException: No ClassLoaders found for: org.jboss.naming:org.jnp.interfaces]

What do I do wrong? I Use ejb3 rc9 and the following code:

java.util.Properties p = System.getProperties();
 p.setProperty("java.naming.factory.initial",
 "org.jnp.interfaces.NamingContextFactory");
 p.setProperty("java.naming.factory.url.pkgs",
 "org.jboss.naming:org.jnp.interfaces");
 p.setProperty("java.naming.provider.url", "jnp://localhost:1099");

 try {
 javax.naming.InitialContext ctx = new javax.naming.InitialContext(p);
[..]

And anther Question:
The mdb is ejb 2.1. Will that be a problem, if a solve the problem above?
thanks.

[nib]

Another hint

[..]
ERROR [STDERR] Caused by: java.lang.ClassNotFoundException: No ClassLoaders found for: org.jboss.naming:org.jnp.interfaces

I have no problem accessing it with my client application, but I must use a SessionBean....