Thanks a lot,

Now it works but i got something strange, I have \running server .the Client
starts but not like its suppose to

in my implementation file to bind the rmiserver with i have
a start method, so that PatientControl will be initialized

  public void start() throws java.rmi.RemoteException
  {

    String titel = "SAPA versie 3.6.3     1 juli 2004";
    PatientControl app3 = new PatientControl(titel);

  }

On the PatientInterface i want to intitialize the start() method
import java.rmi.*;

public interface PatientInterface extends Remote
{
   public void start() throws RemoteException;
}

The PatientClient will initialize start from within the PatientInterface

      PatientInterface patient = null;
       try
       {
           System.setSecurityManager(new RMISecurityManager());

           patient =
(PatientInterface)Naming.lookup("rmi://localhost/PatientServer");

           //String titel = "SAPA versie 3.6.3     1 juli 2004";
          // PatientControl app3 = new PatientControl(titel);
           patient.getPatientNummer();
       }
       catch( Exception e1)
       {
           e1.printStackTrace();
       }

Thanks

Daniel