Has this ever happened to you? My wii will not read my Madden 07 disc, only that one and yes, it's not scratched or anything like that.... Does anyone know what the hell could be wrong, the discs works with another Wii.... wtf?

Could be the disc is dual layer and your wii has some schmutz on the lens. Get yourself a Wii lens cleaner and give it a go! Either that or it needs some calibration, in which case it's off to Nintendo for you!