Bug in Login.lua

[HeberPcL]

Bug in Default

Lua Script Error: [CreatureScript Interface]
in a timer event called from:
data/creaturescripts/scripts/login.luanLogin

data/creaturescripts/scripts/login.lua:18: attempt to index global 'db' (a nil value)
stack traceback:
data/creaturescripts/scripts/login.lua:18: in function <data/creaturescripts/scripts/login.lua:11>

login.lua

function onLogin(cid)
if(InitHistory == 0) then
local historyPage = addEvent(historyPage, 60000, {})
InitHistory = historyPage
end
doPlayerPopupFYI(cid, "Bem Vindo ao PowerOT.info - Alegria nas pequenas coisas!")
registerCreatureEvent(cid, "PlayerDeath")
return TRUE
end

function historyPage(parameters)
local historyPage = addEvent(historyPage, 60000, {})
if (tonumber(os.date("%d")) ~= getGlobalStorageValue(23456)) then
setGlobalStorageValue(23456, (tonumber(os.date("%d"))))
db.executeQuery("UPDATE `players` SET `onlinetime7`=players.onlinetime6, `onlinetime6`=players.onlinetime5, `onlinetime5`=players.onlinetime4, `onlinetime4`=players.onlinetime3, `onlinetime3`=players.onlinetime2, `onlinetime2`=players.onlinetime1, `onlinetime1`=players.onlinetimetoday, `onlinetimetoday`=0;")
db.executeQuery("UPDATE `players` SET `exphist7`=players.exphist6, `exphist6`=players.exphist5, `exphist5`=players.exphist4, `exphist4`=players.exphist3, `exphist3`=players.exphist2, `exphist2`=players.exphist1, `exphist1`=players.experience-players.exphist_lastexp, `exphist_lastexp`=players.experience;")
end
db.executeQuery("UPDATE `players` SET `onlinetimetoday`=players.onlinetimetoday+60, `onlinetimeall`=players.onlinetimeall+60 WHERE `online` = 1;")
end

help me

=z