Why cant i get the percent in moviecliploader? :(

ok guys i tried it all and more than 5 tutorials and cant make this work!

anyone can tell me whats wrong with this code:

var: myMCL:MovieClipLoader = new MovieClipLoader();

myMCL1 = new Object();

myMCL.addListener(myMCL1);

myMCL1.onLoadProgress= function(target, bytes_loaded, bytes_total){
    _root.percent.text = Math.round(bytes_loaded/bytes_total)*100;
}

myMCL.loadClip("flash/portfolio3d.swf", this.framesMC);