java.rmi.ServerException: RemoteException occurred in server thread

I have installed an application in IBM Web sphere. I want to use few application specific jars. So I added the jars in my application root folder and I added in MANIFEST.MF also.

 

But still I am getting the following error:

java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: 

              java.rmi.RemoteException: ; nested exception is: 

              java.lang.NoClassDefFoundError: com.eistream.utilities.expression.op.OpVoid

              at com.ibm.CORBA.iiop.UtilDelegateImpl.mapSystemException(UtilDelegateImpl.java:235)

              at com.ibm.CORBA.iiop.UtilDelegateImpl.wrapException(UtilDelegateImpl.java:743)

              at javax.rmi.CORBA.Util.wrapException(Util.java:296)

.

.

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What may be the reason, please help me.

 

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