Whats my mistake here?

1

the backGround dont change at all

and the circle dont move at all…

tnx for the help

package {
    import flash.display.Sprite;
    import flash.display.StageAlign;
    import flash.display.StageScaleMode;
    import flash.events.Event;
    
    [SWF(width="500", height="400", backgroundColor="#ffffff")] 
    public class EmbedAssets extends Sprite
    {
        [Embed(source="library.swf", symbol="circle")]
        private var Circle:Class;
        
        public function EmbedAssets()
        {
            
            stage.scaleMode = StageScaleMode.NO_SCALE;
            stage.align=StageAlign.TOP_LEFT;
            
            var circle:Sprite = new Circle();
            addChild(circle);
            circle.x=200;
            circle.y=200;
            
            circle.addEventListener(Event.ENTER_FRAME, onEnterFrame);

        }
        
        public function onEnterFrame(evt:Event)
        {
            _parent.circle.x+=5;    
        }
    }
}