In the mani_server.cfg file located in your ftp at cstrike/cfg/mani_server
drag the mani_server.cfg to the desktop. open it up and find this area of the file and make sure these parameters are set to 0. Also in the cal.cfg file located in the sane place find these commands and make sure the parameters are 0.
Code:
*****************************************************************************
// Module : Team Kill/Wound Protection
//
// Desc : The stats module is a very simple ranking system based on 3 methods of
// calculation (defined in mani_stats_calculate).
// *****************************************************************************
// Enable TK Protection 1 = on, 0 = off
mani_tk_protection 0
// Enable TK Punishment menu 1 = on, 0 = off
mani_tk_forgive 0
//Time allowed after freezetime where spawn protection is enabled
mani_tk_spawn_time 0
All basicly what ssj6goku161 said just a bit more detail
Good Luck re-post if this does not solve your problem.