Light doesn't work even after built

So I was following the Digital Tutors tutorial of the introduction to Unreal Editor and at the part where I add Atmospheric Fog and build everything, the light just seems to not affecting my environment …I can’t give more details since I’m new and I don’t know where the problem is… Here is a screen :

http://www.hostingpics.net/viewer.php?id=574012image630.png

Hi Orkidea,

Atmospheric Fog will not produce light for your scene. You will either need to user a Directional, spot, or point light to do so.

Try adding one of these and rebuilding lighting in your scene.

Thank you!

Tim

Wow thanks dude, I never thought someone would reply to this post ! I figured that and I acutally forgot to update the post sorry lol .

Thanks anyway for your interest !