AS Tween problem

allBars is a MC on the stage.

I am thinking this should take allBars MC and tween it from its corrent _x position to _x position -55?

but nothing happens?


//Import the classes
import mx.transitions.Tween;
import mx.transitions.easing.*;
var nStartXPos:Number = allBars._x;
trace(nStartXPos);
center_Btn.onRelease = function():Void  {
 trace(nStartXPos);
 var twSlideLeft:Tween = new Tween(allBars, "_x", Regular, nStartXPos, -55, 3, true);
};