Tween problem

I have my Tween set like this

var myTweenExpandWidth:Tween = new Tween(, "width", Strong.easeOut,, 158, 1, true);
var myTweenExpandHeight:Tween = new Tween(, "height", Strong.easeOut,, 236, 1, true);

It only activates when the MouseEvent occurs of MOUSE_OVER. So in other words when the mouse scrolls over the target the target tweens and expands. When I move the mouse off of the target it contracts down to its original size.

Anyway that works, there is no worries. The problem is when I move my mouse off of the target before it finishes it’s expanding tween it gets stuck at it’s ‘expanded’ size.