Hi, when I try to turn on my n9 it's stuck on Warning! you have modified the device software... here is a pic


I tried to flash the device with original images downloaded via navifirm but I get this error:
bb5_rdc_cert_read failed
bb5_rdc_cert_read failed
bb5_rdc_cert_read failed
bb5_rdc_cert_read failed
bb5_rdc_cert_read failed
bb5_rdc_cert_read failed
mmc: sfdisk returned status 1
mmc: Could not exec 'tune2fs -L rootfs /tmp/sudmmcn
mmc: Could not remove mount directory /tmp/sudmmcnX
ectory
[Pipe 3] Finishing in error state with status 1

please help