PaperVision3D ViewportLayer problem

Hi, everyone!

I´m trying to separte two DisplayObjects 3D into ViewporLaers and controlling their “levels” on rendering.
So I have two ViewportLayers: 1 - cardsHolder; and 2 - floorLayer.

But floor layer is always above the cards layer (its a memory card game).
I did a zip files with the codes and the current result:

Can anyone help me?
Thanks in advice.

pedro paulo almeida