Wrong script!Why!?

[toni1998]

fatal error
9.1 unexpeted '{'

void OnStart()

{
AddUseItemCallBack("", "DulapKey_1", "Cabinet1", "UsedKeyOnDoor", true);
}

void UsedKeyOnDoor(string &in asItem, string &in asEntity)

{
SetSwingDoorLocked("Cabinet1", false, true);
PlaySoundAtEntity("", "unlocked_cabinet", "Cabinet1", 0, false);
RemoveItem("DulapKey_1");
}