i have a 16 gb 2nd g ipod FW 3.1.2 jailbroken. I don t know what i've done but know almost all my apps are missing including the settings ,music ,photos etc.. I tried to restore it or to upgrade it but i get this errors: firmware not compatible or when i try do downlaod the official FW 4.2.1 : error 9005. So can u guys give me some tips?