stinknus

I can find the games via torrent fairly easy, but am I getting games that don't work. or is it the dvds I'm using. I'm using cheap DVD-Rs, and I burn them with ImgBurn

the first time I put the game in the wii the disc channel says Update. I update the wii, the disc channel resets. then it does the little disc channel thing for that game. but when I try to continue it say can not read disc. then after that evertime I put it in the wii it says can not read disc

So what am I doing wrong