Metronom app - problem with threading

Hello,

I have some kind of problem with my metromom application made in j2me. So, without threading this application have sometimes slowdowns, ofcourse this is not acceptable. So I decided to make some threading in this application, but I done something wrong, because application play "Tick" only once. And then is Silence, without threading application was working fine. Here is my source code:

fragment of class "Designer" where i start timer:

Code:

---

    protected void startMetronome() {
        calculateInterval = 60000/(howManyBpm);
        startTimerEvents = new MetronomeTimerEvent(metrum);
        timer.schedule(startTimerEvents, 1000, calculateInterval);
       
    }

---

class "MetronomeTimerEvent" where i specify a new thread and some kind of things.

Code:

---

import java.util.TimerTask;
/**
 * @author Damian
 */
public class MetronomeTimerEvent extends TimerTask{       
   
    public MetronomeTimerEvent(byte metr) {
        i = 0;
        metrum = metr;
        playThis = new PlayTik();
        playThisStart = new Thread(playThis);
    }

    public void run() {
        playThis.changeVariableI(i);
        playThisStart.start();
        i++;
        if(i==metrum)
            i=0;
    }
   
    private byte i;
    private PlayTik playThis;
    private Thread playThisStart;
    public byte metrum;
}

---

Class "PlayTik" where I play a sounds.

Code:

---

import javax.microedition.media.control.*;
import javax.microedition.media.*;

/**
 * @author Damian
 */
public class PlayTik implements Runnable {
   
    public PlayTik() {
        try {
            playTick = Manager.createPlayer(getClass().getResourceAsStream("/1.wav"), "audio/x-wav");
            playTick.realize();
            playTick.prefetch();
        } catch(Exception ex) { }
        VolumeControl volumeV = (VolumeControl)playTick.getControl("VolumeControl");
        volumeV.setLevel(99);
        try {
            playTock = Manager.createPlayer(getClass().getResourceAsStream("/2.wav"), "audio/x-wav");
            playTock.realize();
            playTock.prefetch();
        } catch(Exception ex) { }
        VolumeControl volumeV1 = (VolumeControl)playTock.getControl("VolumeControl");
        volumeV1.setLevel(99);
    }
   
    public void run() {
        testPlay();
    }
   
    public int testPlay() {
            try {
                if(i==0) {
                    playTock.start();
                    return 0;
                }
                else {
                    playTick.start();
                    return 0;
                }
            }catch(Exception ex) { return 1; }
    }
   
    public void changeVariableI(byte changedVariable) {
        i = changedVariable;
    }
   
    public byte i;
    private Player playTick;
    private Player playTock;
}

---

Hope you help me find a solution of this problem! : )