I have a 4 GB A-data Micro SD card that's not functioning correctly. It won't be read on my mac, or on my DS TT. I can confirm that the reader that came with my DS TT is working properly. I tried other readers so I can have my Micro SD card read on the computer, but it can't be read. Is there any solution to fixing it? I tried wiping the contacts and blowing on the slot. When I start up the DS TT card with the micro SD card it gets a loading then a blank white screen. I can't format the card if my computer can't read it.