Tween/easing HELP!

programming flash
1

Hi all,

  i can'tget theis function to work:

textBox.textArea.onEnterFrame = function(){
    var tw_x:Tween = new Tween(this,"_xscale",Elastic.easeOut,100,10,2,true);
    var tw_y:Tween = new Tween(this,"_yscale",Elastic.easeOut,100,10,2,true);
}

I need to know sow i can do the same thing with an alpha tween to a pre loader!