Having trouble, thumbnails repeating horizontally on a vertical scroll bar

Hi every one, I am creating a XML Gallery, I have the gallery working, its just my thumbnails are repeating horizontally, on a vertical scroll bar. I believe it must be the way i have coded my for loop, could any one give me some advice?


example on how my thumbnails are displaying at the moment:

thumbnail 1 Thumbnail 1
Thumbnail 2 Thumbnail 2
thumbnail 3 thumbnail 3

ect


I need it to be
thumbnail 1 Thumbnail 2
Thumbnail 3 Thumbnail 4
thumbnail 5 thumbnail 6

ect


here is the following for loop code i have made for creating the thumbnails:

//creating thumbnails
function createThumbs():void{
for(var i:int = 0; i< thumbsCount; i++){
for(var j:int = 0; j < 2; j++){
var myThumb:Thumbnail = new Thumbnail();
content_mc.addChild(myThumb);
myThumb.buttonMode = true;

//myThumb.x = (120*i)+13;
//myThumb.y = -50;
myThumb.x = (130*j)+20;
myThumb.y = (100*i)+20;
myThumb.i = i+1;
myThumb.j = j;
myThumb.num = myThumb.i;

var loader:Loader = new Loader();
var thumb:String = thumbsArray ;
//var thumb:String = thumbsArray;
var req:URLRequest = new URLRequest(thumb);
loader.load(req);
myThumb.addChild(loader);
loader.y = 0;
loader.x = 0;
myThumb.addEventListener(MouseEvent.CLICK,thumbCli ck);
//j++;
}
}
}