Volume Scatter goes Black I've followed some tutorials on Volume Scatter material in Cycle like this one : 
http://www.blenderguru.com/tutorials/make-atmospheric-lighting-blender/

But I can't go any further because of this :



This is the render of a Volume Scatter material applied on a simple cube.
Whatever the object, whatever the shape. If I turn on the volume on the complete scene, everything goes black.
CPU or GPU render, it's the same. I tried every single option in the render &amp; material, it does not change anything... I'm out of option.

I was really fancy to use that awesome feature, if someone has a solution, I will be super happy !

Thanks ! 
Happy blending !
Your cube is black because your volume scatter node is plugged into the surface input of the material output node.
From the manual page on the shader,

The Volume Shader output must be plugged into the Volume Input of the Material or World Output node.