Error on death

[Kudzu]

This is script:

function onDeath(cid, corpse, lastHitKiller, mostDamageKiller) 
    local cidpos = getPlayerPosition(lastHitKiller) 
    loot = 5943 
    item = doPlayerAddItem(lastHitKiller,loot,1) 
    if(isPlayer(lastHitKiller) == TRUE) then 
        hitKillerName = getPlayerName(lastHitKiller) 
        doSetItemSpecialDescription(item,"This is the heart of "..getPlayerName(cid).." killed at Level "..getPlayerLevel(cid).." by "..hitKillerName..".") 
        doPlayerSendTextMessage(lastHitKiller, MESSAGE_STATUS_CONSOLE_ORANGE, "You Killed " .. getCreatureName(cid) .. ".") 
        doSendMagicEffect(cidpos,12) 
    else 
        hitKillerName = getCreatureName(lastHitKiller) 
        doSetItemSpecialDescription(item,"This is the heart of "..getPlayerName(cid).." killed at Level "..getPlayerLevel(cid).." by a "..hitKillerName..".") 
    end 
    setItemName(item, ""..getPlayerName(cid).."\'s Heart") 
    return TRUE 
end

When player die by monster then I have this error:

 

[Kudzu]

TFS 0.4 DEV. Please help

 

[Fallen Despair]

We cant see the error....

 

[Kudzu]