[erro] Script de spell sequencial

Buenas galera...

Alguém sabe o porque desse código estar retornando um erro no launcher? to usando o TFS 3.7...

--- teste
--- parametros da primeira parte
local combat1 = Combat()
combat1:setParameter(COMBAT_PARAM_TYPE, COMBAT_PHYSICALDAMAGE)
combat1:setParameter(COMBAT_PARAM_EFFECT, CONST_ME_HITAREA)
combat1:setParameter(COMBAT_PARAM_DISTANCEEFFECT, CONST_ANI_SMALLSTONE)
combat1:setParameter(COMBAT_PARAM_BLOCKARMOR, 1)
combat1:setParameter(COMBAT_PARAM_USECHARGES, 1)
--- parametros da segunda parte
local combat2 = Combat()
combat2:setParameter(COMBAT_PARAM_TYPE, COMBAT_PHYSICALDAMAGE)
combat2:setParameter(COMBAT_PARAM_EFFECT, CONST_ME_HITAREA)
combat2:setParameter(COMBAT_PARAM_DISTANCEEFFECT, CONST_ANI_SMALLSTONE)
combat2:setParameter(COMBAT_PARAM_BLOCKARMOR, 1)
combat2:setParameter(COMBAT_PARAM_USECHARGES, 1)
--- parametros da terceira parte
local combat3 = Combat()
combat3:setParameter(COMBAT_PARAM_TYPE, COMBAT_PHYSICALDAMAGE)
combat3:setParameter(COMBAT_PARAM_EFFECT, CONST_ME_HITAREA)
combat3:setParameter(COMBAT_PARAM_DISTANCEEFFECT, CONST_ANI_LARGEROCK)
combat3:setParameter(COMBAT_PARAM_BLOCKARMOR, 1)
combat3:setParameter(COMBAT_PARAM_USECHARGES, 1)

--- formula combat1
function onGetFormulaValues1(player, skill, attack, factor)
	local skillTotal = skill * attack
	local levelTotal = player:getLevel() / 5
	return -(((skillTotal * 0.06) + 7) + (levelTotal)), -(((skillTotal * 0.1) + 11) + (levelTotal))
end
combat1:setCallback(CALLBACK_PARAM_SKILLVALUE, "onGetFormulaValues1")

--- formula combat2
function onGetFormulaValues2(player, skill, attack, factor)
	local skillTotal = skill * attack
	local levelTotal = player:getLevel() / 5
	return -(((skillTotal * 0.06) + 7) + (levelTotal)), -(((skillTotal * 0.1) + 11) + (levelTotal))
end
combat2:setCallback(CALLBACK_PARAM_SKILLVALUE, "onGetFormulaValues2")

--- formula combat3
function onGetFormulaValues3(player, skill, attack, factor)
	local skillTotal = skill * attack
	local levelTotal = player:getLevel() / 5
	return -(((skillTotal * 0.06) + 7) + (levelTotal)), -(((skillTotal * 0.1) + 11) + (levelTotal))
end
combat3:setCallback(CALLBACK_PARAM_SKILLVALUE, "onGetFormulaValues3")

--- função local que manda ver na combat1
local function onCastSpell1(creature, var)
	return combat1:execute(creature, var)
end

--- função local que manda ver na combat2
local function onCastSpell2(creature, var)
	return combat2:execute(creature, var)
end

--- função local que manda ver na combat3
local function onCastSpell3(creature, var)
	return combat3:execute(creature, var)
end

--- função que chama a execução das 3 cast spell em sequencia, 
function onCastSpell(creature, var)
	local parameters = { creature = creature, var = var, combat1 = combat1, combat2 = combat2, combat3 = combat3 }

	addEvent(onCastSpell1, 100, parameters)
	addEvent(onCastSpell2, 800, parameters)
	addEvent(onCastSpell2, 1500, parameters)
end

O erro vai acontecendo no tempo de execução dos parameters...