Preload virker ikke

Hvorfor virker det her ikke. Det er i onEnterFrame det går galt vil jeg mene.

var aImages = new Array("1.jpg", "2.jpg", "3.jpg", "4.jpg");
var iImgNum = aImages.length;
if(this.iImg < 1 || this.iImg == undefined) { this.iImg = 0; }
for(var i:Number=1; i<=iImgNum; i++)
{
    // Create a new movieclip to load external images
    var mcName:String = "imgContainer_mc" + i;
    _root.createEmptyMovieClip(mcName, _root);
    // Load the external movie into the new movieclip
    _root.mcName.loadMovie("images/"+ this.i +".jpg");
    // Create text field for persent loaded
    _root.createTextField(["preloadTxt_txt"+i], i, 250-(i*20), 250-(i*20), 200, 25);
    _root["preloadTxt_txt"+i].text = i;
    _root["preloadTxt_txt"+i].border = true;
}

// Create a new movieclip to load external images
//this.createEmptyMovieClip("imgContainer_mc", this.iImg);
// Create text field for persent loaded
//this.createTextField("preloadTxt_txt", (this.iImg+1), 250, 250, 200, 25);
//preloadTxt_txt.border = true;

// Load the external movie into the new movieclip
//imgContainer_mc.loadMovie("images/"+ this.iImg +".jpg");
// Check the download status of the external movie once every frame

this.onEnterFrame = function()
{
    for(var i:Number=1; i<=iImgNum; i++)
    {
        var mcName:String = "imgContainer_mc" + i;
        trace("onenterframe : " + _root.mcName.getBytesLoaded())
        // Trace the percentage of the movie that has loaded
        _root["percent"+i] = (_root.mcName.getBytesLoaded() / _root.mcName.getBytesTotal()) * 100;
        if(isNaN(_root["percent"+i]) != true)
        {
            _root["preloadTxt_txt"+i].text = Math.round(_root["percent"+i])+ "% loaded"+i;
            if(_root["percent"+i] == 100) _root["preloadTxt_txt"+i]._visible = false;
        }
        if(_root["percent"+i] == 100 && i == iImgNum)
        {
            gotoAndStop(2);
            //delete this.onEnterFrame;
        }
    }
}
stop();