Help with server setup

Hey im sorry if this isnt the proper location for this thread but I was just needing a little help with my newly aquired gmod server. Ive ran many other game servers in the past and my server is functional just as planed running DarkRP gamemode there is only problem which is all players in the game can spawn their own guns from the toolmenu by going to the weapon tab and clicking on them and having not experienced enough script within SRCDS I am left somewhat confused as to where I need to go to change this any advice would be greatly appreciated.

Bump plox?