acekard 2i not working?

nds files downloaded onto my micro SD card can be played on my non dsi acekard, but if I put the micro SD card into my new DSi compatible acekard each game I try to play won't open. I just get the never ending 'loading' message. Is there a problem with the dsi acekard, or is there something extra I need to do to use it? NB. I am using a normal nintendo ds console, not a dsi.

I've heard of this happening with fake cards, or improperly formatted MSD card.Is there a visible square bump under the sticker? In akaio's help menu, what's the HWID?

Also, what firmware are you using, and what brand/size MicroSD?