Gun Shooting Error

hi can some one help me i have a problem shooting some downloaded guns in garrys mod. whenever i shoot guns from kermites wepons pack it ejects out error in big red letters. if you know how to fix this please help.

Probably because you don’t have all the Games required for the Pack, does it say which Games it needs, i THINK it says Counter strike as one and i think thats crucial.

yeah thats what i thought. thanks for your help.