Scheduling multiple alarms
===

I'm trying to trigger 3 alarms at different times using alarm manager. Here's my code (Note that alarm1, alarm2, alarm3 are three calender objects set earlier in my code):

    AlarmNum=1;
    new Runnable() {

			@Override
			public void run() {
				// TODO Auto-generated method stub

				// TODO Auto-generated method stub
				Intent myIntent = new Intent(MainActivity.this,
						MyAlarmService.class);
				pendingIntent = PendingIntent.getService(MainActivity.this, 0,
						myIntent, 0);

				if (AlarmNum == 1)
					alarmManager.set(AlarmManager.RTC_WAKEUP,
							alarm1.getTimeInMillis(), pendingIntent);
				else if (AlarmNum == 2)
					alarmManager.set(AlarmManager.RTC_WAKEUP,
							alarm2.getTimeInMillis(), pendingIntent);
				else
					alarmManager.set(AlarmManager.RTC_WAKEUP,
							alarm3.getTimeInMillis(), pendingIntent);

				Toast.makeText(MainActivity.this, "Start Alarm",
						Toast.LENGTH_LONG).show();
			}
		};

In the above code I start an intent which provokes MyAlarmService class given below:

    public class MyAlarmService extends Service {
	MainActivity instance;
	MediaPlayer mp;

	@Override
	public void onCreate() {
		// TODO Auto-generated method stub
		Toast.makeText(this, "MyAlarmService.onCreate()", Toast.LENGTH_LONG)
				.show();
		mp = MediaPlayer.create(this, R.raw.alarmtone);
		instance = new MainActivity();
	}

	@Override
	public IBinder onBind(Intent intent) {
		// TODO Auto-generated method stub
		Toast.makeText(this, "MyAlarmService.onBind()", Toast.LENGTH_LONG)
				.show();
		return null;
	}

	@Override
	public void onDestroy() {
		// TODO Auto-generated method stub
		super.onDestroy();
		Toast.makeText(this, "MyAlarmService.onDestroy()", Toast.LENGTH_LONG)
				.show();
	}

	@Override
	public void onStart(Intent intent, int startId) {
		// TODO Auto-generated method stub
		super.onStart(intent, startId);
		Toast.makeText(this, "MyAlarmService.onStart()", Toast.LENGTH_LONG)
				.show();
		mp.start();
		instance.setAlarmNum(instance.getAlarmNum() + 1);
	}

	@Override
	public boolean onUnbind(Intent intent) {
		// TODO Auto-generated method stub
		mp.release();
		mp.reset();
		Toast.makeText(this, "MyAlarmService.onUnbind()", Toast.LENGTH_LONG)
				.show();
		return super.onUnbind(intent);
	}

}
I assume there is a problem here because the toasts never show up and neither does the alarm.