I've attempted to downgrade two N3dsXL's and both gave me the Nintendo error screen to power off, which ruins the homebrew. One was on 9.9 and 9.6. I followed Plailect guide to the T and used the links to download the exact programs. I've successfully upgraded other O3dsxl's and installed arm9loader, so I'm not exactly clueless but this is the first time to downgrade. Is there something wrong with sysdowngrader?