Pokémon Platinum don't start.

Hey
I need some help whit Pokémon Platinum, i was just download it and when i start up Pokémon Platinum it says. "The save data could not be accessed. Please turn the power off.. blablabla". Some one thta know how to fix it?plz help me ^^

Are you using an emulator or running it on a flash cart. If you're using an emulator make sure you have it running on the correct setting's, not sure what they are, just experiment but if you're using a flash cart then try updating you firmware.http://www.linfoxdomain.com/
find your flash cart there and download the latest firmware

i have downlaod the last firmwares, so is it just to copy them in to the card?

Pretty much make sure you copy all the files, if you don't know how to do it then pm me and i'll tell you how

https://www.romulation.org/forum/index.php?topic=1462.0