Gmod Server Problem.

Whenever I play on my server and try throwing knives or grenades, they just float in the air. When I switch the mode to DarkRP you can pick up money from printers or
weapons from the gun dealer. And yes, I do have CS:S Content installed on my server.

Also another problem, when I try to choose a job on darkrp, for example, hobo, it will say in chat /hobo, but I dont become a hobo.