I tried another SD card and same thing. I found a solution... I managed to get Gamestop to take it back and let me get a DS Lite. I had traded my original Lite because it was white and parts of the screen were getting touchy.
I bought one of the new Mario DSi bundles not realizing that they already were already updated to 1.4U. My AceKard 2i worked with no problems on my old DS Lite. I updated the firmware on the card following instructions on the Lite. Previously the DSi did not even recognize the AceKard 2i but now...