Ok, I was able to solve the noclassdeffounderror, but now (

) a nasty classcast exception keeps me a wake at night.
This is my error now:
java.lang.ClassCastException: The class loader sun.misc.Launcher$ExtClassLoader@404536 is different from @5383266[PlutoEJBModule.jar]
at com.inprise.vbroker.rmi.CORBA.PortableRemoteObjectImpl.narrow(PortableRemoteObjectImpl.java:261)
at javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:137)
at pluto_enterprise.GenericSessionBean.testMiddleTier(GenericSessionBean.java:2640)
at java.lang.reflect.Method.invoke(Native Method)
I tried to change the classloader policy on both partition servers from per_module to per_container, but

no effect.
Anyone suggestions?
Thanks a lot!
Johan