Spell not working

[amr shalapy]

local combat0_Brush = createCombatObject()
setCombatParam(combat0_Brush, COMBAT_PARAM_EFFECT, CONST_ME_CAKE)
setCombatParam(combat0_Brush, COMBAT_PARAM_DISTANCEEFFECT, CONST_ANI_CAKE)
setCombatParam(combat0_Brush, COMBAT_PARAM_TYPE, COMBAT_PHYSICALDAMAGE)
setCombatArea(combat0_Brush,createCombatArea({{0, 1, 0, 1, 0},
{0, 0, 2, 0, 0},
{1, 1, 0, 1, 1},
{0, 1, 0, 1, 0}}))
function getDmg_Brush(cid, level, maglevel)
    return (10)*-1,(20)*-1
end
setCombatCallback(combat0_Brush, CALLBACK_PARAM_LEVELMAGICVALUE, "getDmg_Brush")

local con___combat0_Brush = createConditionObject(0+CONDITION_PARALYZE)
addDamageCondition(con___combat0_Brush, 3, 1000, -10)
setCombatCondition(combat0_Brush, con___combat0_Brush)
local dfcombat0_Brush = {CONST_ANI_CAKE,-1,2,1,2,-1,-1,1,-1,-1,1,1,1,2,1,-2,1}

local function RunPart(c,cid,var,dirList,dirEmitPos)
    if (isCreature(cid)) then
        doCombat(cid, c, var)
        if (dirList ~= nil) then
            local i = 2;
            while (i < #dirList) do
                doSendDistanceShoot(dirEmitPos,{x=dirEmitPos.x-dirList[i],y=dirEmitPos.y-dirList[i+1],z=dirEmitPos.z},dirList[1])
                i = i + 2
            end       
        end
    end
end

function onCastSpell(cid, var)
    local startPos = getCreaturePosition(cid)
    RunPart(combat0_Brush,cid,var,dfcombat0_Brush,startPos)
    return true
end

i have made spell but it's not working it's does not affect and doesn't deal any damage, i can't figure it anybody can help?