prova con questo

codice:
var mcLoad:MovieClipLoader = new MovieClipLoader();
var mcList:Object = new Object();
mcList.onLoadStart = function(target:MovieClip) {
	target._alpha = 0;
};
mcList.onLoadProgress = function(target:MovieClip) {
	target._parent.testo.text = this[target._name+"__perc"]+"%";
};
mcList.onLoadInit = function(target:MovieClip) {
	target._alpha = 100;
	_level0['effect'] = new PhotoMatrixMotion(target, "luminance", "normal", None.easeNone, 30, false);
	_level0['effect'].onMotionFinished = function(){
	}
};
mcLoad.addListener(mcList);
var mc:MovieClip = this.createEmptyMovieClip("mc", 1);
il codice dei pulsanti non varia...