Hacking Error code while downgrading

[jeppad]

I got a big problem, i tried several SD Cards several launcher.dat and i double checked the firmwares hash to downgrade.

Iam on 6.0.2E and if i try to downgrade it give me a fatal error: Error 00001001

I Upgrades now to 7.1e with tomodatchi life. But it still gives me The error code .



Ans ideas how i can fix this Problem? I dont found anything in the for