After Effects CS6 Lighting not working

Hey everyone,

Just started out with 3d element and I am very new to lighting.

I have got a got sky background with a helicopter model in front of it. When I add a light it does not change the lighting in the scene at all, all the lights are in the right direction and are powerful enough.

The only light which seems to work is the ambient one.


Cheers,

Nic