Same problem here.
New acekard2i (dealextreme) that came in a small(er) packaging without a plastic holder for the card.
Does not show up in the system menu.
Do you have the right main.dol? It's on the lower/second partition.
And the number that you need to change is actually the 12th (11=B) section on line 4c0cc0.
(Note: it's already been changed to 04)