MY server just hanged

[feda alshahwan]

I created a small code for implementing mobile web server but when I try to run it it just doesnot proceed I guess it is a threading problem could you please Check my code and help me to solve it.

  import java.io.*;
import javax.microedition.io.*;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
/**
 * @author fa00064
 */
public class MobileWebServerMidlet extends MIDlet implements CommandListener,Runnable{
    private Form form=new Form("Creating Mobile Web Server");
    private Command startservercommand = new Command("Start Server",Command.OK,1);
    private StringItem stringitem=new StringItem("Server"," If You Want to Start Server Press Start Server Button");
    private Display display;
    private ServerSocketConnection scn;
    private byte DELAY,LINGER,KEEPALIVE,RCVBUF,SNDBUF;
    public void startApp() {
        form.append(stringitem);
        form.addCommand(startservercommand);
        Display.getDisplay(this).setCurrent(form);
        form.setCommandListener(this);
    }
    public void pauseApp() {
    }
    public void destroyApp(boolean unconditional) {
    }
    public void commandAction(Command c,Displayable d){
        if (c==startservercommand)
        {
            try {
               scn = (ServerSocketConnection) Connector.open("socket://:30000");
               Thread t=new Thread(this);
               t.start();
            } catch (IOException ex) {
                ex.printStackTrace();
            }
            
            //display.setCurrent(form);
            //run();
            destroyApp(false);
        }
    }
     public void run(){
    // Create the server listening socket for port 30000
               // ServerSocketConnection scn = null;
           try {
                form.append("Waiting for Client Request....." + scn.getLocalAddress());
                while (true){
         SocketConnection sc;
            try {
                sc = (SocketConnection) scn.acceptAndOpen();
               RequestHandler RH= new RequestHandler (sc);
                           } catch (IOException ex) {
                ex.printStackTrace();
            }
         }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
     }

   // Wait for a connection.
         
     
        public class RequestHandler extends Thread{
             SocketConnection sc;
             RequestHandler (SocketConnection sc){
                 this.sc=sc;
                 start();
                // Set thread priority down to allow server to accept new requests
                setPriority(NORM_PRIORITY-1);
             }

             public void run(){
                 try{
                     form.append("Request Accepted on port number:"+scn.getLocalPort());
                     // Set application specific hints on the socket.
                     sc.setSocketOption(DELAY, 0);
                     sc.setSocketOption(LINGER, 5);
                     sc.setSocketOption(KEEPALIVE, 0);
                     sc.setSocketOption(RCVBUF, 128);
                     sc.setSocketOption(SNDBUF, 128);
                    // Get the input stream of the connection.
                    InputStream is = sc.openInputStream();
                    // Get the output stream of the connection.
                    OutputStream os = sc.openOutputStream();
                    // Read the input data.
                    System.out.println("Going to read data...");
                    int ch = 0;
                    String result= "";
                    //while(ch != 23  && ch != 13)
                    while (ch!=-1){
                    ch = is.read();
                    result=result+(char)ch;

                                       }

                    //System.out.println("Data Read ...");
                   form.append(result);
                   is.close();
                   os.write("WellCome Client".getBytes());
                   System.out.println("data sent to buffer...");
                   os.flush();
                   os.close();

                   sc.close();
                   scn.close();
                  }
                  catch (IOException e){
                 System.err.println(e)  ;
                 e.printStackTrace();
                 }
    }

         
     
        }
     

}