Irrlicht Engine

Thanks !
I turn off flag EMF_ZWRITE_ENABLE.
It's O.K.

Hello.
The Problem is : Cube inside odther cube become invisible when the camera moving.
I set the material shader transparent.
I want to nest transparent cubes inside others. When the camera moving some cube disappear.
How solve this problem ?? z-buffer, backFaceCulling,ISceneNode ...

How set rotation cylinderSceneNode (n1)?
http://marian.ek.w.interii.pl/rot.jpg
(link to image)

code it's not work :
vector3df v2 = n2->getTransformedBoundingBox().getCenter();
vector3df v3 = n3->getTransformedBoundingBox().getCenter();
vector3df direct = v3 - v2;
n1->setRotation(direct ...

I want create 3D objects in modeler and add to my irrlicht scene (it's not problem), but my 3D objects contains elements which i want change (rotate or move) for example: in gauge.X i have two objects :gauge and needle, and i want load it to my scene and rotate needle. When I standard load file ...

How load 3D-objects from x-format file to list<ISceneNode*> objList ?
May be one of you write own MeshLoader witch can do it?

I need load mesh (*.x or *.dfm) as irrlicht scene.
How load mesh from X-file and get individually access for objects from file?
It is possible?