If you Just want the Size to increase you can use this
var zone:MovieClip = this.createEmptyMovieClip('zone', 1);
var TweenJauge:Tween = new Tween(zone, "_height", Regular.easeOut, zone._height, (zone._height+30), .6, true);
and If you want the box to move up with increase in size , add this to the end of code above..
var TweenJaugeY:Tween = new Tween(zone, "_y", Regular.easeOut, zone._y, (zone._y-30), .6, true);
Let me know if this works for you.
thank you, it works
but he was just because i didn't start my square at (0,0)
if i start at (0,0) it works good
but if i do start at (50,50), tween works not in the right way
so now i know i got to start all my square a (0,0) and move them after with mySquare._x etc...