Why isn't multi-touch working for my image buttons?

I am using picture buttons playing sounds with SoundPool. Here's a sample code for one of the image buttons:

ImageButton Button1 = (ImageButton) findViewById (R.id.sound); Button1.setOnTouchListener (new OnTouchListener () {

        public boolean onTouch(View v, MotionEvent event) {
            if (event.getAction() == MotionEvent.ACTION_DOWN ) {
                mSoundManager.playSound(1);
                return false;
            }

            return false;
        }
    });

      

        
        
        
      

    

For some reason, it doesn't let you press multiple buttons at the same time. Is it because I am building for the 1.6 SDK?

Thanks!