I don't have any shooting sounds in my testing map, all other sounds are fine, like walking or bullet impact sounds, but my weapons just dont make any sounds. Also my map is black and my shadows are all fucked up any help?

I used this for the black skybox:

http://ugx-mods.com/forum/index.php/topic,12772.msg138483.html#msg138483

But I still have no clue for the missing gun sounds :v