games freezing with a ttds

i just got my ttds a few days ago. ever since then my games are freezing up at random times ???. sometimes things are worse. for example: Pokemon ranger(the recently released 1) doesn't even load. the loading bar loads but then a white screen and thats it ???. I'm currently using fat and i have my games in a separate folder. any suggestions?

Backup your data and reformat your MicroSD. And then update your firmware at http://www.linfoxdomain.com/ds/.

it worked! my games no longer freeze thx so much!