Bluetooth J2ME - Need practical help with connection example

Hello, I am a newbe in J2ME and Bluetooth. I am trying to run an example I found on the net , but not successfull!! And I am getting frustrated because I need to establish a connection via bluetooth to access some data in a Data base!! Which would be the best connection type?? I am lost too because I didn´t find anywhere explaining where do I find the UUID?? neither the host neither the port in btspp://host:port;parameters.
Here is the example I am trying to run!!!
Note that I didn´t change the UUID and host and port because I don´t know!!! Maybe that´s because it´s not working??
When I execute it, it just opens a black screen with nothing. I am testing it on the Series 60 MIDP emulator of NOKIA. Can anyone help me!!!!!

If anyone has a connection via bluetooth with a data base, I would appreciate too!!

BluetoothMIDlet
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import java.io.*;
import javax.microedition.io.*;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
import javax.bluetooth.*;

public class BluetoothMIDlet extends MIDlet implements Runnable, CommandListener {
     
     public BluetoothMIDlet(){}
     
     public void startApp() throws MIDletStateChangeException{
          new Thread(this).start();
     }
     
     public void pauseApp(){}
     public void destroyApp(boolean unconditional){}
     
     public void run(){}
     public void commandAction (Command c, Displayable d){
          notifyDestroyed();}
     
     
}

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HelloClient
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import java.io.*;
import javax.microedition.io.*;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
import javax.bluetooth.*;

public class HelloClient extends BluetoothMIDlet {
     
     public void run(){
          Form f = new Form("Cliente");
          f.addCommand(new Command("Sair", Command.EXIT,1));
          f.setCommandListener(this);
          Display.getDisplay(this).setCurrent(f);
         
     try {
          LocalDevice local = LocalDevice.getLocalDevice();
          DiscoveryAgent agent = local.getDiscoveryAgent();
          String connString = agent.selectService(
                    new UUID("86b4d249fb8844d6a756ec265dd1f6a3", false),
                    ServiceRecord.NOAUTHENTICATE_NOENCRYPT, false);
         
          if (connString != null){
               try{
                    StreamConnection conn = (StreamConnection)
                    Connector.open(connString);
                   
                    OutputStream out = conn.openOutputStream();
                    out.write("Esta menssagem é de teste".getBytes());
                    out.close();
                    conn.close();
                   
                    f.append("Menssagem enviada corretamente");
                   
               }
               catch (IOException e){
                    f.append("IOException:" + e.getMessage());
               }
               
          }
          else{
               
               f.append("Não foi possivel localizar o servico");
               
          }
     }catch (BluetoothStateException e){
          f.append("BluetoothStateException: ");
          f.append(e.getMessage());
     }
}
}

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HelloServer
==============================================================
import java.io.*;
import javax.microedition.io.*;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
import javax.bluetooth.*;

public class HelloServer extends BluetoothMIDlet {
     
     public void run(){
         
          Form f = new Form("Servidor");
          f.addCommand(new Command("Sair",Command.EXIT, 1));
          f.setCommandListener(this);
          Display.getDisplay(this).setCurrent(f);
         
          try{
               LocalDevice local = LocalDevice.getLocalDevice();
               if (!local.setDiscoverable(DiscoveryAgent.GIAC)){
                    f.append("Falha ao mudar para modo Discoverable");
                    return;
               }
          StreamConnectionNotifier notifier = (StreamConnectionNotifier)
          Connector.open("btspp://localhost:"+"86b4d249fb8844d6a756ec256dd1f6a3");
         
          StreamConnection conn = notifier.acceptAndOpen();
         
          InputStream in = conn.openInputStream();
          ByteArrayOutputStream out = new ByteArrayOutputStream();
         
          int data;
          while ((data=in.read()) != -1) {
               out.write(data);
          }
         
          f.append(out.toString());
          in.close();
          conn.close();
          notifier.close();
         
          }catch (BluetoothStateException e){
               f.append("BluetoothStateException:"+e.getMessage());
          }catch (IOException e){
               f.append("IOException:"+e.getMessage());
          }
         
     }
}

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