Запуск функции по истечении события tween

[Sweet07]

Что не так с этой записью?

bar.addEventListener(MouseEvent.MOUSE_OVER, tween);
 
function tween (e:MouseEvent):void{
	bar.addEventListener(MouseEvent.CLICK, tweenin);
}
 
function tweenin (e:MouseEvent):void{
	bar.addEventListener(Event.ENTER_FRAME, moveBox);
	var MousePos:Number = mouseY;
	var ms:Tween = new Tween(scrollHandle, "y", None.easeOut,scrollHandle.y, MousePos ,1,true);
	ms.addEventListener(TweenEvent.MOTION_FINISH, stoptween);
}
 
function stoptween(e:MouseEvent):void{
	bar.removeEventListener(MouseEvent.CLICK, tweenin);
	bar.removeEventListener(Event.ENTER_FRAME, moveBox);
}
 
function moveBoxP1(e:Event):void {
	IPRT1.y = 38-(scrollHandleP1.y - 200)/2;
}