Problem with spell "double impact"

[Hitsugaya]

Hello, I wanted to create a spell that hits 2 times. 2 shots with the same damage at an interval of 100 milliseconds, but did not really want to work. And here is the script :

local combat1 = createCombatObject()
setCombatParam(combat1, COMBAT_PARAM_TYPE, COMBAT_PHYSICALDAMAGE)
setCombatParam(combat1, COMBAT_PARAM_EFFECT, CONST_ME_DOUBLEIMPACT)
setCombatParam(combat1, COMBAT_PARAM_DISTANCEEFFECT, CONST_ANI_CRYSTALARROW)

function onGetFormulaValues(cid, level, skill, attack, factor)
min = -(skill + attack + (level * 2))
max = -(skill + attack + (level * 2.2))
	return min, max
end

local combat2 = createCombatObject()
setCombatParam(combat2, COMBAT_PARAM_TYPE, COMBAT_PHYSICALDAMAGE)
setCombatParam(combat2, COMBAT_PARAM_EFFECT, CONST_ME_DOUBLEIMPACT)
setCombatParam(combat2, COMBAT_PARAM_DISTANCEEFFECT, CONST_ANI_CRYSTALARROW)

function onGetFormulaValues(cid, level, skill, attack, factor)
min = -(skill + attack + (level * 2))
max = -(skill + attack + (level * 2.2))
	return min, max
end


local function onCastSpell1(cid, var)
    doCombat(cid, combat1, var)
end

local function onCastSpell2(cid, var)
    doCombat(cid, combat2, var)
end

setCombatCallback(combat1, CALLBACK_PARAM_SKILLVALUE, "onGetFormulaValues")
setCombatCallback(combat2, CALLBACK_PARAM_SKILLVALUE, "onGetFormulaValues")

function onCastSpell(cid, var) 
addEvent(onCastSpell1, 0, cid, var) 
addEvent(onCastSpell2, 100, cid, var) 
end

Bugs in the console when i running the engine (I have TFS 0.3.6pl1) :

Error - Spell Interface
Description :
<luaSetCombatCallBack> Cannot load callback

When i use that spells in game i have that error in console :

Error - Spell Interface
<Unknown script file>
Description :
attempt to call a nil value

Please help

 

[Hitsugaya]

Refresh ... Please fast help :<