Check if sound is playing AS2

var miSonido:Sound;
var sndObj:Object;
 
miSonido= new Sound(sndObj);
 
onEnterFrame = mx.utils.Delegate.create(this,checkProgress);
miSonido.onLoad = mx.utils.Delegate.create(this,onLoadInitSound);
 
mySound.loadSound("elMp3.mp3");
 
 
function checkProgress():Void{
	if(miSonido.position != miSonido.duration){
 
		trace("La musica se esta escuchando");
 
	};
 
};
 
function onLoadInitSound(success:Boolean){
	trace("la musica empezo");
	miSonido.start();
 
};