RMI Objects Help

Hi,

I'm having a little problem with compiling the RMI Stub. Getting the
following error. Have attached all relevant source code below. Hope
someone can help!

Thanks,
Rajat

ERROR
======
D:\Projects\TreeServer\TreeServer_Stub.java:6: class
TreeServer.TreeServer_Stub must be declared abstract. It does not
define java.lang.Object getChild(char, TreeServer.Nodes, short,
java.lang.String) from interface TreeInterface.TreeInterface.
public final class TreeServer_Stub

===========
TreeServer.java
===========
package TreeServer;

import java.rmi.Naming;
import java.rmi.RMISecurityManager;
import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;

import TreeInterface.*;

public class TreeServer extends UnicastRemoteObject implements
TreeInterface {
    static final long serialVersionUID = 10000;

    NodeManagement nm = new NodeManagement();

    public static void main(String[] args) {
        try {
            if (System.getSecurityManager() == null) {
                System.setSecurityManager(new RMISecurityManager());
            }
            TreeServer q = new TreeServer();
            Naming.rebind("rmi://localhost/TreeService", q); // sets the
            // handle
            System.out.println("Start Main RMI Server");
        } catch (RemoteException er) {
            System.out.println("Exception in Main RMI Server: " + er);
        } catch (Exception err) {
            System.out.println("Exception occurred: " + err);
        }
    }

    public TreeServer() throws RemoteException {
        // do the init here.
        super();
    }

    public Nodes getChild(char c, Nodes nod, short difficulty, String
dictionary)
            throws RemoteException {
        return nm.getChild(c, nod, difficulty, dictionary);
    }
}

=============
Nodes.java
=============

package TreeServer;

public class Nodes{
    public char letter;

    public int first_Child_offset = 1000;

    public boolean isTerminal = true;

    public boolean isLastSibling = true;

    public int NodeNo;

    public Nodes() {

    }

    public Nodes(int NodeNo, char letter, boolean isTerminal,
            int first_Child_offset, boolean isLastSibling) {
        this.NodeNo = NodeNo;
        this.letter = letter;
        this.isLastSibling = isLastSibling;
        this.first_Child_offset = first_Child_offset;
        this.isLastSibling = isLastSibling;
        this.isTerminal = isTerminal;
    }
}

=================
NodeManagement.java
=================

package TreeServer;

import java.io.*;
import java.util.*;

public class NodeManagement {

    public NodeManagement() {
       }

    public Nodes getChild(char c, Nodes nod, short difficulty, String
dictionary) {

        /// this returns a node object. code is just too big to paste here.
    }

}

=============
TreeInterface.java
=============

package TreeInterface;

import java.rmi.*;
import TreeServer.*;

public interface TreeInterface extends java.rmi.Remote {

    public Nodes getChild(char c, Nodes nod, short difficulty, String
dictionary)
            throws RemoteException;
}

============
TreeClient.java
============

package TreeClient;

import java.rmi.*;

import TreeInterface.*;
import TreeServer.Nodes;

public class TreeClient {
    TreeInterface rq;

    public TreeClient() {
        try {
            rq = (TreeInterface) Naming.lookup("rmi://localhost/TreeService");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public Nodes getChild(char c, Nodes nod, short difficulty, String
dictionary) {
        try {
            return rq.getChild(c, nod, difficulty, dictionary);
        } catch (Exception e) {
            return (new Nodes());
        }
    }
}