Tween event listener not working

Hi,

In a frame script I have an event listener that should call the 'onFinish' function when the tween motion is finished. (See pertinent parts in red below.) I never see that 'done tweening' output. It fails silently. I've tried the addEventListener in different places.. to no avail. What am I missing?

Thanks!

import fl.transitions.*; import fl.transitions.easing.*; import fl.transitions.Tween; import fl.transitions.TweenEvent; var currentFrameMC = animImg; var scaleXTween:Tween=new Tween(animImg,"scaleX",Bounce.easeOut, 1,2,2.4,true); var scaleYTween:Tween=new Tween(animImg,"scaleY",Bounce.easeOut, 1,2,2.4,true); var alphaTween:Tween = new Tween(animImg, "alpha", Strong.easeOut, .5, 1, 11, true); //Put a listener on the MC so I can tell when it's done tweening the scale. currentFrameMC.addEventListener(TweenEvent.MOTION_FINISH, onFinish); //This is another event listner put on a button: //(The button, when clicked, will trigger the shrinking of the animImg MC) reverseTween1.addEventListener(MouseEvent.CLICK,shrinkFrameMC); //Shrink/scale down the anImg by tweening function shrinkFrameMC(e:MouseEvent)  //This scales down the playing movie clip {  scaleXTween=new Tween(currentFrameMC,"scaleX",None.easeNone, currentFrameMC.scaleX,1,3,true); scaleYTween=new Tween(currentFrameMC,"scaleY",None.easeNone, currentFrameMC.scaleY,1,3,true); //Tween the alpha state of the movie clip again, this time in reverse alphaTween=new Tween(currentFrameMC, "alpha", Strong.easeOut, 1, .5, 11, true); } function onFinish(e:TweenEvent):void //This does an action when the frame MC is done tweening {    trace ("done tweening" );    //NEVER SEE THIS OUTPUT }