Stargate shield problem

Ok, so I had garrysmod with alot of mods installed all of them were working including stargate and its shield tool the a couple of weeks later I decided to reinstall gmod with no mods (a few basic ones) then I moved stargate from my old addons folder to the fresh gmod addons folder, then I installed CAP (carters addon pack) and tryed to use shields ingame and now everytime I seem to block something I giant checkered square comes up, I think this is somthing to do with the textures but I dont know how because I have installed everything how it should be installed.

Thanks,
-Xavach