I just purchased a wii on ebay. Turns out the mii channel doesn't work. Comes up with error: "mii channel system files are corrupted. Please refer to the wii operations manual for help troubleshooting. Press the A button to return to the wii menu " Any idea how to fix this? I tried to install a mii channel wad, but it didn't change. Do I maybe need to uninstall the broken one first?