[KWo]

Go to the folder:
addons/amxmodx/configs
and find two files:
1. plugins.ini - here You have to find these lines:
; Counter-Strike
;restmenu.amxx ; restrict weapons menu
;statsx.amxx ; stats on death or round end (CSX Module required!)
;miscstats.amxx ; bunch of events announcement for Counter-Strike
;stats_logging.amxx ; weapons stats logging (CSX Module required!)

and uncomment last 4 lines - take out ";" from the begining of thse lines - these lines with *.amxx - but take out only this semicolon ";" existing at the begining of the line.

2. modules.ini - here find these lines:
; ----------------------------------------------------------
; Counter-Strike - adds functions specific to Counter-Strike
; ----------------------------------------------------------
;cstrike_amxx_i386.so
;cstrike_amxx.dll

; -----------------------------------------------------
; CSX - adds functionality for CS statistics and events
; -----------------------------------------------------
;csx_amxx_i386.so
;csx_amxx.dll

and uncomment (take out ";" from the begining of the line) the call for cstrike_amxx.dll (or that *.so filr if You have a linux based system) and csx_amxx.dll (note like for cstrike_amxx.dll).

Save both files and try again. During the game call amxmodmenu (from console or by some bind) and select (on the second page) stats configuration.
My bind for amxmodmenu (added in config.cfg in cstrike directory):
bind "'" "amxmodmenu"
I guess I have to move this thread to another forum (Metamod,AMX and third-party plugins).