[away3d] Plane in ObjectContainer3D : troubleshouting

[fdb]

Hello,

I have some trouble with a Plane  contained in a ObjectContainer3D as
you can see on this page :

http://florent.dibartolo.free.fr/fullscreen.php?title=doorsteps


The Plane I am speaking of is the Plane on the left wall on the room :
He doesn't show at all.

I don't understand why because on other Plane (the right wall of the
room) contained in the same ObjectContainer3D appears correctly as you
can see.

Do you have any idea ?

Here is some of the code used : //this == ObjectContainer3D;

                        wallLeft = new Plane({material:wallMat, width:wallWidth,
height:wallHeight, segmentsW:10, segmentsH:5});
                        wallLeft.x=-roomWidth/2;
                        wallLeft.y=wallG.height/2;
                        wallLeft.rotationX=90;
                        wallLeft.rotationY=90;
                        wallLeft.outline = outlineMat;
                        this.addChild(wallLeft);

                        wallRight = new Plane(wallLeft.clone(wallLeft));
                        wallRight.x=roomWidth/2;
                        this.addChild(wallRight);