Attachsound doesnt work when loaded?

1 
playSound = function(name, varSound) {
	name.stop();
	mSound = new Sound();
	mSound.attachSound(varSound);
	mSound.onSoundComplete = function() {
		name.play();
	
	};
	mSound.start();
};

this is the code i am using in the MAIN movie and is placed on the root of the timeline…

On my MOVIE1 which is loaded on the MAIN movie, i placed this code to call that function on certain frames

 _root.playSound(this,"myMusic.mp3");

myMusic.mp3 is the linkage identifier…

the problem is the sound doesnt play at all… but when i copy playSound function on the _root of the MOVIE1 and test it (just playing the MOVIE1 without loading it to the main movie), it works fine… what seems to be wrong here? what did i missed?

Thanks for any help…