Forcing VGA doesn't work

[Xenphor]

At least 4 games (Next Tetris Online Edition, NFL Blitz 2000, NBA Showtime, and Nightmare Creatures II - TOSEC versions) don't work with a SCART 31Khz adapter to OSSC. I get an "Unsupported AV Cable" screen. Openmenu doesn't seem to have an option to force VGA in the menu, and I read it is supposed to do it automatically.

If I use the Test version of GdmenuCardManager and install Gdmenu instead, I am able to use Gdmenu's Force VGA option to run the games in VGA mode.

[mrneo240]

Known issue. Still unsure why. Thank you