Please help me, to set icon button :

/*

* To change this template, choose Tools | Templates * and open the template in the editor. */ package tajwed;

import javax.microedition.midlet.*;

import com.sun.lwuit.*;
import com.sun.lwuit.animations.*;
import com.sun.lwuit.events.*;
import com.sun.lwuit.layouts.BoxLayout;
import com.sun.lwuit.plaf.*;
import java.io.IOException;
import java.util.Hashtable;

/** * @author Muhamad BUrhanudin */ public class tajwedMidlet extends MIDlet implements ActionListener{

Form    mHomeForm;
Form    mAwayForm;
Form    mMenuTajwid;

Command mExitCommand;

Button btMenu;
Button btNunSukun, btMimSukun, btNunTasjid;
Button btLamtarif, btIdgham, btMaad, btRaa;
Button btHelp;
Button btExit;

Command mBackCommand;


public void startApp() {
    Display.init(this);

    installTheme();
    createUI();
    mHomeForm.show();

}

public void pauseApp() {
}

public void destroyApp(boolean unconditional) {

}

public void actionPerformed(ActionEvent ae)
{
        mAwayForm.setTransitionInAnimator(
            Transition3D.createCube(400, false));

        mMenuTajwid.setTransitionInAnimator(
            Transition3D.createCube(400, false));


        mMenuTajwid.setTransitionOutAnimator(
            Transition3D.createCube(400, true));

        mAwayForm.setTransitionOutAnimator(
            Transition3D.createCube(400, true));

    if ((ae.getSource()==btMenu)|| (ae.getSource()==btHelp))
    {
        //mAwayForm.show();
        if(ae.getSource()== btMenu)
        {
            mMenuTajwid.show();
        }
    }
    else if (ae.getSource() == mBackCommand) {
        mHomeForm.show();
    }
    else if ((ae.getCommand() == mExitCommand) || (ae.getSource()== btExit))

      notifyDestroyed();
}

private void installTheme()
{
   UIManager uim = UIManager.getInstance();
    Hashtable ht = new Hashtable();
    ht.put("sel#" + Style.BG_COLOR, "ffffff");
    ht.put(Style.BG_COLOR, "d5fff9");
    ht.put(Style.FG_COLOR, "000000");
    uim.setThemeProps(ht);

 }
private void createUI() {
  // Set up screen for transitions.
  mAwayForm = new Form("Away");
  mAwayForm.addComponent(new Label("Choose Back to return to the home screen."));

  mMenuTajwid = new Form("MENU DASAR TAJWID");
//  mMenuTajwid
  mMenuTajwid.setLayout(new BoxLayout(BoxLayout.Y_AXIS));

  btNunSukun = new Button("Hukum Nun Sukun & Tanwin");
  btNunSukun.addActionListener(this);
  mMenuTajwid.addComponent(btNunSukun);

  btMimSukun = new Button("Hukum Mim Sukun");
  btMimSukun.addActionListener(this);
  mMenuTajwid.addComponent(btMimSukun);

  btNunTasjid = new Button("Hukum Nun Tasydid & Min Tasydid");
  btNunTasjid.addActionListener(this);
  mMenuTajwid.addComponent(btNunTasjid);

  btLamtarif = new Button("Hukum Laam Ta'rief");
  btLamtarif.addActionListener(this);
  mMenuTajwid.addComponent(btLamtarif);

  btIdgham = new Button("Idgham");
  btIdgham.addActionListener(this);
  mMenuTajwid.addComponent(btIdgham);

  btMaad = new Button("Maad");
  btMaad.addActionListener(this);
  mMenuTajwid.addComponent(btMaad);

  btRaa = new Button("Raa'");
  btRaa.addActionListener(this);
  mMenuTajwid.addComponent(btRaa);

  mBackCommand = new Command("Back");
  mMenuTajwid.addCommand(mBackCommand);
  mMenuTajwid.addCommandListener(this); // Use setCommandListener() with LWUIT 1.3 or earlier.

  // Set up main screen.
  mHomeForm = new Form("Java Mobile Learning");
  mHomeForm.setLayout(new BoxLayout(BoxLayout.Y_AXIS));

  btMenu = new Button("TAJWID LEARNING");
  btMenu.addActionListener(this);
  mHomeForm.addComponent(btMenu);

  try
  {
  btHelp = new Button("HELP",Image.createImage("/help.ico"));
  btHelp.addActionListener(this);
  mHomeForm.addComponent(btHelp);
  }
  catch(IOException e)
  {

  }

  btExit = new Button("EXIT");
  btExit.addActionListener(this);
  mHomeForm.addComponent(btExit);

  mExitCommand = new Command("Keluar");
  mHomeForm.addCommand(mExitCommand);
  mHomeForm.addCommandListener(this); // Use setCommandListener() with LWUIT 1.3 or earlier.
}

}