XML thumbnail help

programming flash
1

my thumbnails are doing this:

X X X X X X X X X X X X

I want them to do this:

X X X
X X X
X X X
X X X

Can anyone help me??

This is my script:

var nextX = 0

var xmlfilephotos:XML = new XML();
var initThumb:Object = new Object();

xmlfilephotos.onLoad = function() {
	for (var i:Number = 0; i<xmlfilephotos.firstChild.childNodes.length; i++) {
		initThumb.photo = (xmlfilephotos.firstChild.childNodes*.attributes.photo);
		makeAThumb(i);
		nextX += 115;
		


function makeAThumb(num) {
	thumbName = "mcThumb"+num;
	mcScroller.attachMovie("thumb", thumbName, num, initThumb);
	mcScroller[thumbName].mcPhoto.loadMovie("pictures/thumbs/"+mcScroller[thumbName].photo+".jpg");
	mcScroller[thumbName]._x = nextX;
	mcScroller[thumbName]._y = 0;
	mcScroller[thumbName]._alpha = 80;
}

xmlweddingphotos.ignoreWhite = true;

xmlweddingphotos.load("filephotos.xml");
this.createEmptyMovieClip("mcScroller", this.getNextHighestDepth());
mcScroller._x = -644.5;
mcScroller._y = -50;