Fatal error, Please help.

[XeOnTricks]

i just started writing the script for a custom story im making and i got a fatal error when i tried to start the game.
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FATAL ERROR: Could not load script file
'custom_stories/TheUnforgiven/maps/TheUnforgiven.hps'!
main (14, 53) : ERR : Expected '('
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heres my script so far, i can't find out what it's talking about.
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void OnStart()
{
PlayMusic("06_amb.ogg", true, 4, 3, 1, false);

AddUseItemCallback("", "Key_1", "Door_1", "Unlock", true);

}


void Unlock(string &in asItem, string &in asEntity)
{
SetSwingDoorLocked(asEntity, false, true);

PlaySoundAtEntity("", "unlock_door.snt", asEntity, 0, false);

RemoveItem(asItem);

}




void OnEnter()
{



}



void OnLeave()
{



}

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