Black White render/preview

[cirocirociro]

Maybe is a stupid question,but I would ask why I get this render without color?(i have applied a UVW map and textures on every object)
http://imageshack.us/photo/my-images/59/rendersimcity4.jpg/
I hope in an answer
thanks to all

[Orange_o_]

your textures are visible in your window work?

[cirocirociro]

your textures are visible in your window work?

Of course yes,but when I make a preview it's only in b/w