[Help! Jumpy Tween (Newbie)]

Thanks for your response . Great! It works when I published it to web page. But when I published in stand alone swf or win projector, it still appears jumpy.
My friend told me to give flash player time to take a breath before doing his stuff using this:
public class Main extends MovieClip
{

public function Main()
{
TweenLite.delayedCall(0.2, onTween, null);
}

public function onTween()
{
var obj:Object = { x:100, y:100, ease:Back.easeIn };
TweenLite.to(box_mc, 3, obj);
}
}
It works well

[Help! Jumpy Tween (Newbie)]

Here's the link to the files: http://www.mediafire.com/?6y923oyryuam2m3...

[Help! Jumpy Tween (Newbie)]

Hello everyone, I need help here. I tried Greenshock's Tweenlite, but I found the animation appears "jumpy". I don't know what's wrong
The file's attached. Here's the code of document class:
package  
{
    import com.greensock.*;
    import com.greensock.easing.Back;
    import flash.display.MovieClip;


    /**
     * ...
     * @author
     */
    public class Main extends MovieClip
    {
        
        public function Main()
        {
            TweenLite.to(box_mc, 3, { x:100, y:100, ease:Back.easeOut } );
        }        
    }

}
// (I used Flash CS 6 btw )