if I see it correctly, you cannot have values surrounded by quotes "
I put the values without quotes.
The problem is, that there is a DOS popup which comes foreground when I'm playing. Before, there was an error in it, but now, the window comes without error, but always in front.
As a last resort, you can try to delete "mame.ini" and let MAME create a fresh file.
Already done, one time after resintalling EL and MAME and after by deleting MAME.INI.