ForceSmoothing...i can't get it working!

Hello everybody,

I can’t get working the ■■■■■■ forcesmoothing…
The case is this: i have a slideshow (AS2) which dynamically loads images from an XML file…all of them anyway are loaded with a really bad quality (jagged edges and so on). I want to enable the forcesmoothing propoerty in the code but i can’t get it working, they still are loading non anti-aliased. I am novice so i think it’s possible that i am doing something wrong in the code…i will really appreciate any opinion about it.
I am posting the function that refers on loading images :

function callFullImage(myNumber) {

myURL = myImages[myNumber].attributes.full_url;
myTitle = myImages[myNumber].attributes.title;
_root.createEmptyMovieClip("fullImage_mc",_root.getNextHighestDepth());
fullImage_mc._x = _root.full_x;
fullImage_mc._y = _root.full_y;

var fullClipLoader = new MovieClipLoader();
var fullPreloader = new Object();
fullClipLoader.addListener(fullPreloader);

fullPreloader.onLoadInit = function(mc:MovieClip) {

        mc.forceSmoothing = true;

    };

fullPreloader.onLoadStart = function(target) {
    target.createTextField("my_txt",fullImage_mc.getNextHighestDepth(),0,0,200,20);
    target.my_txt.selectable = false;
            
};

fullPreloader.onLoadProgress = function(target, loadedBytes, totalBytes) {
    target.my_txt.text = Math.floor((loadedBytes/totalBytes)*100) + "%";
    
    var my_fmt:TextFormat = new TextFormat();
        
        my_fmt.color = 0xC0C0C0;
        my_fmt.font = "LTErgo"
        my_fmt.size = 13
        target.my_txt.embedFonts = true;
        target.my_txt.setTextFormat(my_fmt);
};

fullPreloader.onLoadComplete = function(target) {
    new Tween(target, "_alpha", Strong.easeOut, 0, 100, .5, true);
    target.my_txt.removeTextField();
    target.createTextField("my_txt1",fullImage_mc.getNextHighestDepth(),660,751,1000,400);
        
                
        target.my_txt1.selectable = false;
          target.my_txt1.text = myTitle;        
        
        var my_fmt1:TextFormat = new TextFormat();
        
        my_fmt1.color = 0xB8B8B8;
        my_fmt1.font = "LTErgo"
        my_fmt1.size = 15
        my_fmt1.letterSpacing = 2.2;
        my_fmt1.leading = -7;
        
        
        target.my_txt1.embedFonts = true;
        target.my_txt1.antiAliasType = "advanced";
        target.my_txt1.sharpness = 50;
        target.my_txt1.setTextFormat(my_fmt1);

    
    };

fullClipLoader.loadClip("full_images/"+myURL,fullImage_mc);

}