Motion Tween Problems

programming flash
1

I have two buttons on my stage which both trigger a tween of a movie clip. When you click the first button the movie clip tweens from a y value of 235 to a y value of 635. That works fine. However, when you click the second button, it should tween that same movie clip once again, this time from a y-value of 635 to 680, but the clip just stays in place. The first works, the second doesn’t. Below is my code. Anyone know why the second tween is not getting triggered?



// tween variable defined
var movePlacesTween: Tween;

// mouse event when you click first button
pageloaderA.addEventListener(MouseEvent.CLICK, movePeople);


// code for first tween
function movePeople(event:MouseEvent):void {
    movePlacesTween = new Tween(pageloaderB, "y", Strong.easeOut, 235, 635, 0.5, true);
   // mouse event when click second button
   pageloaderB.addEventListener(MouseEvent.CLICK, movePlaces);
}

// code for second tween
function movePlaces(event:MouseEvent):void {
    movePlacesTween = new Tween(pageloaderB, "y", Strong.easeOut, 635, 680, 0.5, true);
}