Need help darkRP

Hello all , first sorry for my bad english here is my problem on darkRP 2.3.5 :

I want to change some commands like rp_voiceradius (i want it 1 instead of 0) , but in which files i have to put this ? In autoexec.cfg i put rcon rp_voiceradius 1 and rp_voiceradius 1 it still don’t work

  1. My second problem is that when i fire with a gun on someone , he don’t loose life … why ?