I have just received my DSTT and 2gb kingston sd card. Loaded games onto the card no problem and played a few games. Turned the ds on again to find that it had been completed wiped clean. Thought it was something my son had done so reformatted the sd card and reloaded firmware and more games onto it. My son played his ds for most of the day with no problems but has now turned on the ds to find menu? being displayed and the sd card is now empty again. Does anyone know what is causing this or how I can stop this happening? I have used a few of these cards before but never had any problems. Do you think the dstt or the sd card is faulty? Thanks for your help!