Help with Gm_underwaste

I recently downloaded it and can play it, but certain things, including the floor has black and pink squares every where!

Why wont this work?

i might have installed wrong, so can someone post a tutorial? here’s link http://www.garrysmod.org/downloads/?a=view&id=84800

It requires both CSS and EP2, do you have both?

Yes i have both.

It could be because i uninstalled tortoiseSVN. Because wire and PHX3 runs off it. So I am reinstalling it.

Any help???