Have bought a Wii pre-modded with WiiKey. Trying to get the WiiKey Setup disk to run, but I keep getting "Unable to read the disk" message. I can run backups burnt using the same settings as the setup disk, so I suspect it isn't a burner/media issue. Is there anything special I need to do for the setup disk to get it to run? What about if my Wii is modded using a different chip than WiiKey - would that cause this problem?