i have had 3 cds worth of various mame roms that i got a couple years ago and recently i downloaded the newest version of mame32 and i find that alot of the roms aren't working like they had so long ago. when i go to the audit part in mame, many times it says games like metal slug or marvel super heroes are missing files, but they worked fine on the mame that i used years ago. must i download new roms as these could be obsolete for some reason?