[away3d] Help, Please!!!

[SITH]

Hi to all 3d proff )

I have a question:

I have 2 containers  (MovieClips), each container has 3d rotation and
3d translation. I have an another MovieClip as a child of the first
container. This MovieClip has 3d rotation and 3d translation also...
How can I put this MovieClip from the first container to the second
container without any transformation of this object (like nothing
happening - no any movement, scale or rotation of the MovieClip) ?

I have a solution, but it works wrong:

public class SomeContainer extends Sprite
        {

                override public function addChild
(param_child:DisplayObject):DisplayObject
                {
// I have this for compute new child transform: child.transform =
Matrix3D.multiply(Matrix3D.inverse(newcontainer.transform),
Matrix3D.multiply(oldcontainer.transform, plane.transform));

                        if (param_child.transform.matrix3D == null)
param_child.transform.matrix3D = new Matrix3D();
                        if (param_child.parent.transform.matrix3D == null)
param_child.parent.transform.matrix3D = new Matrix3D();
                        if (transform.matrix3D == null) transform.matrix3D = 
new Matrix3D
();

                        var inv_m:Matrix3D = transform.matrix3D.clone();
                        inv_m.invert();

                        var child_m:Matrix3D = 
param_child.transform.matrix3D.clone();
                        var prevCont_m:Matrix3D =
param_child.parent.transform.matrix3D.clone();

                        prevCont_m.prepend(child_m);
                        inv_m.prepend(prevCont_m);

                        super.addChild(param_child);

                        param_child.transform.matrix3D = inv_m;

...


As result child keep it self position (!!! - it's good), but new child
rotation is wrong!!!

How can I restore child rotation ? Or what should I use to keep not
only the child position, but the child rotation too ?

Help me please!!!

P.S. Sorry for my poor English )