Sorry for bringing this old thread back, but I have the same problem and I would like some help.
I have tried formatting the SD Card (tried a 2GB 'standard', a 16GB SDHC, and a 64GB SDXC) to FAT 32 (32K Cluster). Every time, the DS says it cannot recognize the card. It does not allow me to format it either. Is there any known solution to this? I have to point that it was working absolutely fine, until I decided to format the card on the PC.
dude why did you dump a old thread. you will get more answers in a thread which you create yourself.