Вопрос Ошибка в скрипте

[NiceCheats]

Постоянно вылазит ошибка "attempt to index a nil value (global 'Client')"

local function event_listener(event)
if event:GetName() == "player_death" then
local attacker = engine.GetPlayerIndexByUserID(event:GetInt("attacker"))
local dead = engine.GetPlayerIndexByUserID(event:GetInt("userid"))
local me = engine.GetLocalPlayer()
if attacker == me and dead ~= me then
local entity = entitylist.GetPlayerByIndex(dead)
engine.ExecuteClientCmd("say " .. entity:GetName() .. " BE GOD! Get NeverCry.wr ");
end
end
end
client.RegisterCallback("fire_game_event", event_listener)

Вот скрипт