Script Fatal Error

[SystemFail]

Sory, its still unexpected token '{'. I putted in brackets under void OnStart as you said. But im getting the same error. And the numbers are 19,1.
I have no problems about door. Door and sound are working perfect. Now my script is

void OnStart()
{
AddEntityCollideCallback("Player", "Ahmet_Quest_Area", "GetAhmetQuest", true, 1);
AddEntityCollideCallback("Player", "Ahmet_Complete_Area", "FinishAhmetQuest", true, 1);
}

void GetTheQuest(string &in asParent, string &in asChild, int alState)
{
AddQuest("ahmetquest", "AhmetQuest");
}

void FinishTheQuest(string &in asParent, string &in asChild, int alState)
{
CompleteQuest("ahmetquest", "AhmetQuest");
}



{
AddUseItemCallback("", "TheKey_1", "door_1", "UsedKeyOnDoor", true);
}

void UsedKeyOnDoor(string &in asItem, string &in asEntity)
{
SetSwingDoorLocked("door_1", false, true);
PlaySoundAtEntity("", "unlock_door", "door_1", 0, false);
RemoveItem("TheKey_1");
}


I have a mistake, but i dont know what.

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i found a random name on internet. It's ahmet. really i like it