[away3d] looking for a simple way to change the colormaterial on rollOver a mesh

[Colir]

Hello.
As my post title say, i'm serach for an easy way to change the color
material on a rollovered mesh

i clone a collada, and i try to change is color whan my mouse is over
it...
here is my code:


var gabFloorMat:ShadingColorMaterial = new ShadingColorMaterial
(0x81ccef,{cache:false});
var selectedFloorMat:ShadingColorMaterial = new ShadingColorMaterial
(0xbddfef,{cache:true});

var floorGab = Collada.load("floorGab.dae",{autoLoadTextures :
true,scaling:0.005});
floorGab.addOnSuccess(gabLoadSucess)
function gabLoadSucess(evt:LoaderEvent):void{
        floorGab = ObjectContainer3D(evt.loader.handle);
        floorGab.position = new Number3D(0,0,0);
        for(var i:int=0;i <= nbFloor;i++){
                floorGab.clone(this["floor"+i])
                this["floor" + i].name = "floor" + i
                this["floor" + i].y = 20*i
                hospital.addChild(this["floor" + i])
                this["floor" + i].addOnMouseOver(manageFloorInfo);
                this["floor" + i].addOnMouseOut(manageFloorInfo);
                }

function manageFloorInfo(evt:MouseEvent3D):void{
        var currentFloor = evt.object
        currentFloor.mouseEnabled = true
        currentFloor.useHandCursor = true
        currentFloor.material = selectedMaterial
        }


as you can think, nothing happen
currentFloor.material always return "null"

I also try to instance my material to change in my loadSucess function
floorMat = floorGab.materialLibrary.getMaterial("floorID")

and in my rollover function
floorMat .material = selectedMaterial

this work but of course all my cloned collada change color....


please, can you help me ?