i have uninstalled the game, then tried to reinstall it, but it stop the install quickly( error opening file DSlauncher) i have downloaded the iso again to try, but same thing!
sound to me like youre iso is corrupted. try to download a new one and store it on you,re most recent storage device. see if that changes things, i think the one you use now has broken sectors and thus lost data.
well like i said, maybe you downloaded a new iso but is the storage device it went on to corupted. try to redownload and select an diferent storage device if posible.