Problem with selecting maps

[Master Madness]

Hi,

I could use some help with a problem with my one year old Ipod nano clone: I suddenly can't select any music maps anymore. I recently put some music of Korn (maybe that band is cursed?) and now if I select a map it will just open the first map on the list. And as you probably know it can be quite annoying to push many times on the button before you finally have the right number. Not sure if this is necessary, but here is my firmware version: PMA300_006 RYJ-3.5.35

Thanks in advance!