Ambient occlusion messed up

Sunray

Hey my ambient is darker on some places of the models at certain poly's does any know what the reason is behind it? 

CGXel

The hard edge could be causing it, I'm not sure but you could try, I haven't used 3ds Max in a long time but I recall there was an option called "Poly group smooth shading" or something like that, make sure its activated (click on any number).

Look
https://www.youtube.com/watch?v=-Iswm1xKtGs