ERROR: Unexpected end of file

[death5657]

Hi im stuck to and really don't know what to do can you help me??? all it says main (25,15) : ERR : Expected "{"
hear is my hps file:
////////////////////////////
// Run first time starting map
void OnStart()
{
AddUseItemCallback("", "K_1", "door_1", "UsedKeyOnDoor", true);
}

void UsedKeyOnDoor(string &in asItem, string &in asEntity)
{
SetSwingDoorLocked("door_1", false, true);
PlaySoundAtEntity("", "unlock_door.snt", "door_1", 0, false);
RemoveItem("K_1");
}

/////////////////////////////
// Run when entering map
void OnEnter()
{


}

////////////////////////////
// Run when leaving map
void OnLeave()