Methods work on Client(stub) and not on Server

Question

package rmi;
import java.io.Serializable;
import java.rmi.RemoteException;
import javax.swing.JOptionPane;
import rmi.persistence.IUser;
import rmi.persistence.User;
import server.socket.Recording;
public class UserHandle implements Serializable, IUserHandle{
     private static final long serialVersionUID = 1L;
     private User user;
     private int port;
     public UserHandle(int sport, String usr){
          port = sport;
          user = new User(usr);
          JOptionPane.showMessageDialog(null,"user " + user.getName() +" on port " + port + " logged in");
     public boolean startRecording(String file) throws RemoteException{
          JOptionPane.showMessageDialog(null,"in startRecording");
          try{
               new Recording(this,file).start();
               return true;
          } catch (Exception e){
               return false;
     public boolean startPlaying(String file) throws RemoteException{
          return true;
     public int getPort() throws RemoteException{
          JOptionPane.showMessageDialog(null,"in getPort");
          return port;
     public IUser getUser() throws RemoteException{
          JOptionPane.showMessageDialog(null,"in getUser");
          return user;
}This is an Object createt with RMI on the Server, the JOptionPane in the Constructor is correctly shown on the server, but when i call methods on this object, the JOptionPanes are shown on the Client, wich is obviously not what i want, i thought that these functioncalls are transferred to the server and executet there!
finally getUser und getPort show the correct names but new Recording(this,file).start(); won't work since its called on the clientside oder the stub and not transferred to the server...
How may i solve this? I want to create a new Recording on the Server.
regards Norbert

Answer 1

public class UserHandle implements Serializable, IUserHandle{Here you've said that it implements Serializable, and it's not an exported remote object, so it's serialized to the client. Java did exactly what you told it to do. Perhaps what you mean is this:
public class UserHandle extends UnicastRemoteObject implements IUserHandle{