[flexcoders] embedded background image not loading

[dsds99]

Trying to make a simple component..and trying to set the background
image..

package{
        import flash.display.Bitmap;

        import mx.containers.HBox;

        public class Hbox1 extends HBox{

                [Embed(source="SkyBackground.jpg")]
                [Bindable]
                public var imgcls:Class;

                public function Hbox1():void{

                        var img:Bitmap = new imgcls() as Bitmap;
                        setStyle("backgroundImage",img);

                }
        }
}