tween inside of the mc

[birninglich]

hi, Ive this code here

import caurina.transitions.Tweener;
var naviLineX:Number = 250;
var naviLineY:Number = 150;

for (var i:Number = 0; i < 7; i++)    {
        //trace(naviXML.punkt[i].attribute(lang));
        
        
        var naviPunkt:navi_mc = new navi_mc();
        naviPunkt.name = "P" + i;
        naviPunkt.buttonMode = true;
        naviPunkt.y = 50;
        naviPunkt.x = naviLineX;

        
        for (var x:Number = 0; x < 6; x++) {

            var naviUpunkt:upunkt_mc = new upunkt_mc();
            naviUpunkt.x = 0;
            naviUpunkt.name = naviPunkt.name + "UP" + x;
            naviUpunkt.y = naviLineY;
            naviPunkt.addChild(naviUpunkt);
        }

        addChild(naviPunkt);
        naviPunkt.addEventListener(MouseEvent.ROLL_OVER, displaySubNavi);
        function displaySubNavi(e:MouseEvent):void{
            Tweener.addTween(e.currentTarget.naviUpunkt, {y:100, time:2});
        }
    naviLineX += 70;
    naviLineY = 150;
} 

the problem is nothing happens on roll over but the "naviUpunkt" is inside of the "naviPunkt".