Arcade Games button mapping problem

Hi, I’m trying Games and emulators, most of them work great, but FinalBurn Alpha/Mame Roms have a problem with button mapping.
One of the buttons (strong punch in fighting games) is not working, (already tried different controllers)
Trying to remap using kodi menu doesn’t solve this,
There’s any way to remap inside FBA ? (any hidden config file, etc)