Cannot get Bosconian to work on Mame4Droid on my Nvidia Shield! (0.139u1)

I got an Nvidia Shield the other day and just got MAME up and running on it. Its native MAME app is called MAME4Droid and works on the 0.139u1 romset. The exorcist cast.

For some reason, I cannot get Bosconian to work in this version of MAME at all. I've downloaded multiple versions of it trying to make it work. I heard that usually later versions of MAME roms will work on older versions, so I tried that, because I can't find a complete 0.139u1 ANYWHERE. (Why they decided this app uses that romset is beyond me, as it sounds pretty uncommon.)

Anyway, when I try to run Bosconian, no matter which MAME version of the parent and clone roms I download, MAME always says that I'm 'missing one or more required rom or chd files'. Does anyone know what the problem is? I know Bosconian, of all things, is capable of running on this software, because I've already gotten a good lot of Namco's other titles running just fine. However, Bosconian is my favorite Namco title and I'd love to have it for nostalgia's sake.

Can anyone help me figure out what the problem is? Any help is greatly appreciated!