Flex :: Events - Integrate Flare3D Into Application?

I'm building an application with the Flex framework and the 3D graphics library Flare3D. I want to be able to embed my 3D scene into an MXML application and still have the mouse events dispatched to the 3D scene.

Here is my code:
- The MXML app:
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"

[Code]....

The problem is that the 3D rendering is done by default in a "layer" that is behind the 2D layer (where we can put MXML components). By default, if we mix 3D and 2D elements, we can't see 3D elements. So I added backgroundAlpha="0". This solved the problem of showing the 3D view. But now I have another problem, I can't move the cube (which is the default behaviour) when I click on the scene and move the mouse. I understand that this is because the 3D view is behind the 2D view.

Is it possible to give the 3D view the focus for mouse events (when it's needed) ? Or is there a different way of doing what I want ? The only hack I figured out is to uncomment this //stage.getChildAt(0).visible = false; which make the 2D view invisible. But I want to mix 2D elements and 3D view, so it's not a solution.