Android UDP connection not receiving any data

I am new to this, so please help me if I ask stupid questions.

I am trying to make a UDP connection between Eclipse PC Emulator and an Android phone
(or between two Android phone devices).

I have a router , and the phone connects to the Internet through the Wi-Fi network of the router. The PC is also on the same network (direct connection of the router to the PC). I am trying to send some text data from a server stream to a client stream, but nothing received / sent .: (

Java Server class ( RE-EDITED, the server receives a message from the client ):

public class server implements Runnable 
{
    // the Server Port
    public static final int SERVERPORT  = 6000;

    // running Server thread.
    public void run() 
    {
        Log.d("redwing","server thread started.");
        DatagramSocket serverSocket = null;

        try
        {
            // Open Server Port
            serverSocket = new DatagramSocket(server.SERVERPORT);
            byte[] receiveData  = new byte[32];
            byte[] sendData     = new byte[32];
            // loop until "server_finished"  becomes False.
            while(createserver.server_finished)
            {
                if(renderer.gGL!=null)  // ignore me, just a null pointer checker
                {
                    // waiting for the incoming client message packet
                    DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
                    serverSocket.receive(receivePacket);
                    renderer.recv = new String(receivePacket.getData());
                    Log.d("server","packet received from client, ETA " + timing.getNow() + " " + renderer.recv); // timing getNow - just returns current system minute & second.

                    // server is replying to the client back with a message.
                    InetAddress IPAddress = receivePacket.getAddress();
                    int port = receivePacket.getPort();

                    sendData = new String("server msg").getBytes();
                    DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, IPAddress, port);
                    serverSocket.send(sendPacket);
                    renderer.sent = new String(sendData, 0, sendData.length);
                    Log.d("server","packet sent to client, ETA " + timing.getNow() + " " + renderer.sent);     // timing getNow - just returns current system minute & second.
                }
            }
            // close the socket
            if(serverSocket!=null) serverSocket.close();
            serverSocket = null;
        }
        catch (Exception e) 
        {
            Log.e("server", "Error", e);
            if(serverSocket!=null) serverSocket.close();
            serverSocket = null;
        }
        finally 
        {
            if(serverSocket!=null) serverSocket.close();
            serverSocket = null;
        }
        Log.d("redwing","server thread terminated.");
    }
}

java (RE-EDITED, ):

public class client implements Runnable 
{
    public static final int CLIENTPORT  = 5000;
    // running Client thread.
    public void run() 
    {
        Log.d("redwing","client thread started.");
        DatagramSocket clientSocket = null;

        try
        {
            // getting local address 
            clientSocket = new DatagramSocket(server.SERVERPORT);
            InetAddress IPAddress = InetAddress.getByName("192.168.0.100");  

            // displaying IP & hostname.
            Log.d("client", "IP: " + IPAddress.getHostAddress() + " Name: " + IPAddress.getHostName());
            byte[] sendData     = new byte[32];
            byte[] receiveData  = new byte[32];
            // Loop until client_finished becomes False.
            while(createclient.client_finished)
            {
                if(renderer.gGL!=null)  // ignore me, just a null pointer checker
                {
                    // sending a message to the server
                    sendData = timing.getNow().getBytes();
                    DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, IPAddress, client.CLIENTPORT);
                    clientSocket.send(sendPacket);
                    renderer.sent = new String(sendData,0,sendData.length);;
                    Log.d("client","packet sent to server, ETA " + timing.getNow());  

                    // waiting for the server packet message.
                    DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
                    clientSocket.receive(receivePacket);
                    renderer.recv = new String(receivePacket.getData());
                    Log.d("client","packet received from server, ETA " + timing.getNow());
                }
            }
            // close the socket
            if(clientSocket!=null) clientSocket.close();
            clientSocket = null;
        }
        catch (Exception e) 
        {
            Log.e("client", "Error", e);
            if(clientSocket!=null) clientSocket.close();
            clientSocket = null;
        }
        finally 
        {
            if(clientSocket!=null) clientSocket.close();
            clientSocket = null;
        } 
        Log.d("redwing","client thread terminated.");
    }
}

:

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.INTERNET"/>
<user-permission android:name="android.permission.NETWORK" />
<uses-permission android:name="android.permission.CHANGE_WIFI_MULTICAST_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

Android Android.

, ... , . noting . , .

?

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