Mysteries of the Beyond Full Conversion - Final - file

Still can't combine the hammer and the chipper :/

The hammer and chipper won't combine. Is there a way or coding to make them combine?

I got an errorlog file, in which it says EXCEPTION_ACCESS_VIOLATION. Do I have to load Justine instead of "Launch Game", which it is just a blank button?

//COMBINE HAMMER//
//////////////////

void hammer_chipper(string ∈ asItemA, string ∈ asItemB)
{
PlayGuiSound("15_make_hammer", 1.0f);
RemoveItem(item_1); RemoveItem(item_2);
GiveItem("stone_hammer_chipper", "Puzzle", "stone_hammer_chipper", "stone_hammer_chipper.tga", 0);
GiveSanityBoost();
}

void OnGameStart()
{
AddCombineCallback("hammer_chipper", "stone_hammer_1", "stone_chipper_1", "hammer_chipper", false);
}

On the top, do we add COMBINE CHIPPER or something similar next to or below it? And do we add make_chipper next to make_hammer or other? In my opinion, these might be why it doesn't combine