Problem with terrain texture

I have mountain terrainmesh in my scene that appears black in the ogre ofusion preview window, no matter how I change the lighting. (position and light types etc...) I even adjusted the self illumination of the material. What can be the problem?

Do your scene has shadows enabled?

Is there any texture applied?

Apperently, I used a to dark texture. Ogre lighting couldn't properly lit this too dark texture. (With a lot of black and grey shades in it.) I then applied a lighter texture, and it worked.