Voxel Data texture for smoke

Hi,

With the help of Blenderguru flame thrower tutorial, I’m trying to simulate a rocket smoke trail in Blender 2.62

So everything works pretty well in my project until I create a new Voxel Data texture for the Domain.
When I set “object domain” to my…Domain (which is a cube), the texture preview is totally black and I can’t see any smoke. Plus, if I hit F12 to render I can’t see any smoke as well.

I watched the tutorial again and again, I tried to reboot my computer and blender but it does’t change anything.

If someone got any idea of what’s going on in my project, it would be awesome!

here are some screenshots:
http://imageshack.us/photo/my-images/39/blendy1.jpg/
http://imageshack.us/photo/my-images/40/blendy2.jpg/