Strange exception that only occurs the first time i call a WS operation

[Alex Parvan]

When i call any WS operation from a J2ME client i get this strange exception:
java.rmi.MarshalException: Unexpected Exception : unexpected end of stream

The thing is, the WS receives the info i send, but the client doesn't receive the response. And even more wierd is that this only happens the first time, if i run the client again, it's all ok. I tried using J2SE and that works fine.

I can pass whatever data to whatever WS operation, it's the same story.

This is my J2ME code:

public void startApp() {
    try {
        pack.WSService_Stub service = new pack.WSService_Stub();
        boolean result = service.anyOperation();
        System.out.println(result);
    } catch (RemoteException e) {
        e.printStackTrace();
    }
}