Send various messages via bluetooth J2ME

[Josan23]

Hello, I have a problem. I'm developing a J2ME application to send messages via bluetooth and I can't send more than one. I don't know why!! if you can help me please. Answer me or contact at joseaferrando@hotmail.com. The code is based on

http://wiki.forum.nokia.com/index.php/Bluetooth_Chat_HelloWorld

//FOR SERVER
public void run(){
        System.out.println("Starting server - please wait...");
try {
   
    //notifier = null;
    //con = null;
   
            local_device = LocalDevice.getLocalDevice();
            System.out.println("SERVER: " + local_device.toString());
           
            DiscoveryAgent disc_agent = local_device.getDiscoveryAgent();
            System.out.println("SERVER: " + disc_agent.toString());
           
            local_device.setDiscoverable(DiscoveryAgent.LIAC);
            String service_UUID = "6";
            deviceName = local_device.getFriendlyName();
            String url = "btl2cap://localhost:" + service_UUID + ";name=" + deviceName;
            System.out.println("SERVER: " + url);
           
            //if (midlet.connectedServer == false){
            notifier = (L2CAPConnectionNotifier)Connector.open(url);
           // con = (L2CAPConnection)Connector.open(url);
            //con = (L2CAPConnection)notifier.acceptAndOpen();
            //midlet.connectedServer = true;
            //}
           
            // L2CAPConnectionNotifier notifier = (L2CAPConnectionNotifier)Connector.open(url);
            // con = notifier.acceptAndOpen();
                                   
            while (listening) {
                con = (L2CAPConnection)notifier.acceptAndOpen();
                              
                if (con.ready()){
                    System.out.println("READY!");
                           
                    //midlet.connectedServer = true;
                                        byte[] b = new byte[1000];
                    //
                    System.out.println("1B " + b.toString());
                    // 
                    con.receive(b);
                    //
                    System.out.println("2B " + b.toString());
                    //
                    String s = new String(b, 0, b.length);
                   
                    //System.out.println("Recieved from client: " + s.trim());
                    strText = midlet.get_txfSend().getString();
                    mysend(strText);
                    //midlet.get_listInbox().append(s.trim(),null);
                   //listening=false;
                   
         
          
//           notifier.close();
//            notifier = null;
//            con = null;
                }
                else
                {
                   // con = notifier.acceptAndOpen();
                    System.out.println("NO ha entrado en el if");
                }
               
                 con.close();
            }
                          
        }catch(BluetoothStateException e){System.out.println(e);} catch(IOException f){System.out.println(f);}
    }

// FOR CLIENT

public void run() {
        System.out.println("Starting client - please wait...");
        try {
           
            //con = null;
           
            LocalDevice local_device = LocalDevice.getLocalDevice();
            System.out.println("CLIENT: " + local_device.toString());
           
            DiscoveryAgent disc_agent = local_device.getDiscoveryAgent();
            System.out.println("CLIENT: " + disc_agent.toString());
           
            local_device.setDiscoverable(DiscoveryAgent.LIAC);
            inq_listener = new InquiryListener();
            synchronized(inq_listener)    {
                disc_agent.startInquiry(DiscoveryAgent.LIAC, inq_listener);
                try {inq_listener.wait(); } 
                catch(InterruptedException e){}
            }
           
            Enumeration devices = inq_listener.cached_devices.elements();
            System.out.println("CLIENT: " + devices.toString());
           
            UUID[] u = new UUID[]{new UUID( "6", false )};
            int attrbs[] = { 0x0100 };
            serv_listener = new ServiceListener();
            while( devices.hasMoreElements() ) {
                synchronized(serv_listener)    {
                    disc_agent.searchServices(attrbs, u, (RemoteDevice)devices.nextElement(), serv_listener);
                    try {serv_listener.wait();} catch(InterruptedException e){}
                }
            }
        } catch (BluetoothStateException e) {System.out.println(e);}
       
        if (serv_listener.service!=null){
            try {
                String url;
                url = serv_listener.service.getConnectionURL(0, false);
                System.out.println("CLIENT: " + url.toString());
               
                deviceName = LocalDevice.getLocalDevice().getFriendlyName();
                System.out.println("CLIENT: " + deviceName.toString());
               
//                if (midlet.connectedClient ==false){
//                    con = (L2CAPConnection) Connector.open( url );
//                    con.send("".getBytes());
//                 }
               
               con = (L2CAPConnection) Connector.open( url );
                     con.send("".getBytes());

                 byte[] b = new byte[1000];
              
                while (listening) {
                    
                    if (con.ready()){
                    //    midlet.connectedClient = true;
                       
                        con.receive(b);
                        System.out.println(b.toString());
                       
                        String s = new String(b, 0, b.length);
                        System.out.println("Received from server: " + s.trim());
                      
                        //listening = false;
                        System.out.println("CLIENT: " + s.trim());
                       
                       midlet.get_listInbox().append(s.trim(),null);
                      
                     
                      
                     }
                    
                }
               con.close();
                 
            } catch (IOException g) {System.out.println(g);}
        }
    }

//THANK YOU