MAME problems

I hope this doesn't break the rules and if it does I'm sorry. Anyway some of the ROMs won't show up on the list. I know for a fact that I put them in the right folder as the other ones work. Anyway here's the list:
Marvel vs. Capcom (This will not load as it says it's missing a ROM or CHD file. It works just fine on the PC)
Marvel vs. Capcom (set 1)(This will not load as it says it's missing a ROM or CHD file. It works just fine on the PC)
Soulcalibur (won't show up on list)
Soulcalibur II (won't show up on list)
Soulcalibur III (won't show up on list)
Star Wars Arcade (won't show up on list)

Pleas help :(

1.Look for a sdl mame wii compatibility list on google (I don't know if I can link it here, so I wont bother) It has a lot of notes it might be worth your while reading.

2.bear in mind the wii is not as powerful as your pc.