ClassCastException in RMI application

Hello,

i found some mails complaining about ClassCast Exception but mine is a
bit different and i coulnt find any explanation.. Please help me..

********** CList Interface *************
import java.rmi.*;
import java.util.Properties;

public interface CList extends Remote{
  public Properties getClients() throws RemoteException;
}

********** CListImpl ******************
import java.rmi.*;
import java.rmi.server.*;
import java.util.Properties;

public class CListImpl extends UnicastRemoteObject
   implements CList {
  public CListImpl () throws RemoteException {
  }

  public Properties getClients() throws RemoteException{
    return clients;
  }
  public Properties clients=new Properties(); // I'm trying to return
back a Properties file..
}

*********** CListClient ****************
import java.rmi.*;
import java.rmi.server.*;
import javax.naming.*;
import java.util.Properties;

public class CListClient {
    public static void main(String[] args)
   {
      System.setProperty("java.security.policy", "client.policy");
      System.setSecurityManager(new RMISecurityManager());
      String url = "rmi://localhost/";

      try
      {

         Context namingContext = new InitialContext();
         CList c1 = (CList) namingContext.lookup(url +
"akclients"); // Register name
         Properties clients=new Properties();
         clients=(Properties)c1.getClients();
         System.out.println(clients);

      }
      catch (Exception e)
      {
         e.printStackTrace();
      }
   }
}

************** In the Server side *******************
import java.util.Properties;
import java.rmi.*;
import java.rmi.server.*;
import javax.naming.*;

public class Server {
  public CListImpl c1;
public Server(){

}

}