Help my R4 Doesn't work anymore..

Hello,My r4 Stopped working. When i played a game and then turn my ds off and on i get a strange White Stripe on my Touch screen en the top screen.
And when i click on "games"i see nothing but the background. (i can't use start)
When i copy the folders from my other SD card (with r4) to the card it works.
But after a game-session it does not work... and it all starts from the beginning...Can someone help me?(srry for my bad english :))

Back up all the games and save files on your MicroSD (copy them to somewhere on your computer).
Format your MicroSD (right click on it, choose "Format")
Restore the latest firmware files for your R4, you can get them at www.linfoxdomain.com/dsRestore the game and save files to your MicroSD.

Thnx :PI thought of that just before you posted this uuh Post.. ^^