Why does this happen?

1

If I specify the width and height of my roomContainer, the image does not appear. If I comment out the width and height, the image appears. Why does this happen? The actual image size in pixels is 656 x 424.


stop();
//create a container to hold the large room images
var roomContainer:MovieClip = new MovieClip();

//set room location
roomContainer.x = 75;
roomContainer.y = 75;
//roomContainer.width = 559;
//roomContainer.height = 361;
addChild(roomContainer);

//add the default large room
var defaultRoom:String = "rooms/bedroom_1.png";
var defaultLoader:Loader = new Loader();
defaultLoader.load(new URLRequest(defaultRoom));
defaultLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, defaultLoaded, false, 0, true);

function defaultLoaded(event:Event):void {    
    roomContainer.addChild(event.target.content);    
}