Problem with dark material and spotlight

Hi all. I have a problem with dark material and spotlight.

Screen: http://imageshack.us/photo/my-images/542/g2ho.png/

If the light going to light material it is good, but if it going to dark - this light don't work.

Scnd screen: http://imageshack.us/photo/my-images/689/zrj8.png/

Edit: Material screen: http://imageshack.us/photo/my-images/855/diex.png/

I looked in Quality settings, but I didn't find something about light.