CHOOCH81 I have the same problem that you and the reason is not the way to use the manager or the firmware, it seems to be the DS Lite.
I have the DS Lite white and impossible to use Tetris, metroid and new mario (double white screen) with M3 CF and Passkey 2
Is there someone who success to use those games with a DS Lite and M3 with some other configuration (m3 sd mini, or something else M3 based) BUT with a Lite please ??????
thanks for answer
im using CF M3 adapter using flashme 7 and Tetris & Mario both work fine on a DS Lite.