I have problem when I downgrading Wii. It's show error message is "ret = -1035".
I try to downgarde to another version but it has same problem.
I installed "IOS16-64-v257-prod.wad" but it still same.
I downgrade with Waninkoko's CIOS Downgrader 1.0 b'cos V 2.0 can't run on my Wii it restart...