Basic sky problem

Hi
I made a test with the basic sky :
I buld an hollow cube (he sky cube) , slighty bigger than the map cube , place the map cube inside the sky one then I applied the sky flag on each side of the sky cube and finally I erased the upper side of the map cube.
So I can see the sky.

The risult is not right , and the sky is static , a static image.
Where I wrong ? I follow the aum61 template workhop

edit: with the cube settings , it works (but it is static..)

have you checked the "sky" check box on the texture settings?

Yes, now it works, it was a question of settings.