Movieclip height and width

programming flash
1

Hi,
I’m making a little photo album in flash, where my pictures are being added in a movie clip.
The problem I have is when I add a with and height to my movie clip, I can’t see it anymore. It’s probably a stupid mistake, but I’ve been searching for an solution these past days, but I didn’t find any.

(when I don’t add the width and height, I can see the pictures)
Here’s a little part of the code.

var mc:MovieClip = new MovieClip();
            mc.width=300;
            mc.height=100;
            
            var plaatsx:Number = 300;
            var imageList:XMLList = images.image.thumbnail;
            for each (var imageElement:XML in imageList){
                trace(imageElement);
                var img:ImageLoader = new ImageLoader(this, "assets/images/images/" + imageElement);
                img.loadAsset();
                img.x =  plaatsx + 120;
                img.y =  200;
                mc.addChild(img);
                plaatsx = img.x;
            }
            trace (mc.height + mc.width);
            content.addChild(mc);
}