Hello evry one

I have a proplem with MAME i know there is alot of other guys out there with this proplem but anyway

I cant open some games the only games i can open is tetris (pack1) and 88games.

when i try to open other games it says: this game is missing one or more required ROM or CHD images.

I have installed both neogeo bois and awbios and it still wont and again the only games that works is tetris (pack1) and 88games