I've searched all over these forums, but I've been unable to find a fix. I've downgraded my Wii to 3.2u, installed Starfall, and installed the rev 7 cIOS and the gamma launcher using EmperorOfCanada's guide. All backups I've tried work fine except Mario Kart. I've tried multiple burns at multiple speeds, but it still refuses to work. It gets to the wiimote safety screen, and then goes to a black screen saying "Unable to read the disc. Please read the manual" or something similar. What baffles me is that every other backup works fine. I was able to play one race in Mario Kart once, and then after racing it sent me back to the "Unable to read disc" screen. Since then, it only shows the black disc error screen. I had softmodded it before following EmperorOfCanada's guide, but it seemed like the downgrade to 3.2u and the upgrade to gamma processes worked fine, with no errors. Any help would be greatly appreciated. Any idea what's wrong?