I have a simple EJB application that I can deploy and test on a local WebLogic instance (v10.3.0.0) without problems. I need to deploy this on a remote WL server (v10.3.3.0), and test it from a local machine. Deployment is successful, but when I try to run any of the clients from JDeveloper, I get this error:

<2010.06.02. 16:08:36 CEST> <Error> <RJVM> <BEA-000503> <Incoming message header or abbreviation processing failed
 java.io.InvalidClassException: org.eclipse.persistence.exceptions.ValidationException; local class incompatible: stream classdesc serialVersionUID = 3793659634176227230, local class serialVersionUID = -7605463488982202416
java.io.InvalidClassException: org.eclipse.persistence.exceptions.ValidationException; local class incompatible: stream classdesc serialVersionUID = 3793659634176227230, local class serialVersionUID = -7605463488982202416
    at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:562)
    at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1583)
    at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1496)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1316)
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
    at weblogic.rjvm.ClassTableEntry.readExternal(ClassTableEntry.java:36)
    at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
    at weblogic.rjvm.InboundMsgAbbrev.readObject(InboundMsgAbbrev.java:65)
    at weblogic.rjvm.InboundMsgAbbrev.read(InboundMsgAbbrev.java:37)
    at weblogic.rjvm.MsgAbbrevJVMConnection.readMsgAbbrevs(MsgAbbrevJVMConnection.java:227)
    at weblogic.rjvm.MsgAbbrevInputStream.init(MsgAbbrevInputStream.java:173)
    at weblogic.rjvm.MsgAbbrevJVMConnection.dispatch(MsgAbbrevJVMConnection.java:439)
    at weblogic.rjvm.t3.MuxableSocketT3.dispatch(MuxableSocketT3.java:322)
    at weblogic.socket.AbstractMuxableSocket.dispatch(AbstractMuxableSocket.java:394)
    at weblogic.socket.SocketMuxer.readReadySocketOnce(SocketMuxer.java:917)
    at weblogic.socket.SocketMuxer.readReadySocket(SocketMuxer.java:849)
    at weblogic.socket.JavaSocketMuxer.processSockets(JavaSocketMuxer.java:283)
    at weblogic.socket.SocketReaderRequest.run(SocketReaderRequest.java:29)
    at weblogic.work.ExecuteRequestAdapter.execute(ExecuteRequestAdapter.java:21)
    at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:145)
    at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:117)

Can anyone explain why I'm getting this error, and what I can do to resolve it?