I recently bought a neogeo arcade machine with a 1 slot motherboard and i bought samuri showdown from someone else and it just snaped right on when i removed the game that the arcade cab came with it runs great. But, then ive bought some more carts from somebody else and none of them seem to work in my 1 slot neogeo board the were MVS carts and i figured they should have worked am i wrong or are this mvs carts different types.