@urko948 The roms / zip files shouldn't be renamed. Mame expects them with specific names, because in the emulator is a database of filenames and other informations. Thats why you need a specific romset for a specific Mame version btw. If you rename anything, then you should do this within the gamelist.xml or elsewhere related. So, you should bring back the original state of roms with original names. Then remove the non working gamelist.xml by moving the file to different place for later analysis.
And then? I don't know. :D Maybe upload the faulty gamelist.xml, so we can check it and maybe see something unusual going on.