Why doesnt my key work?

[Putkimato]

I followed this video: http://www.youtube.com/watch?v=ABI7NUqkX...re=related
and my key doesnt work.

hps file:
////////////////////////////

// Run when entering map

void OnEnter()

{

Haha there was space at my key name

AddUseItemCallback("", "key_1", "mansion_1", "KeyOnDoor", true);

}

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

{

SetSwingDoorLocked("mansion_1", false, true);
PlaySoundAtEntity("", "unlock_door", "mansion_1", 0, false);
RemoveItem("key_1");

}

extra english lang:

<LANGUAGE>
<RESOURCES>
</RESOURCES>
<CATEGORY Name="Inventory">
<Entry Name="ItemName_key1">Cellar Key</Entry>
<Entry Name="ItemDesc_key1">This key looks rusty and old.</Entry>
</CATEGORY>
</LANGUAGE>

When i pick up key, it says: "Picked up Cellar key" like it should say, and when i use it door: "Cannot use item this way"

Help please..