Hacking Gamecube Backuploader 0.2 Error DVD266

[salut_seul]

The game's ISO size is more than 1.4G and I burning the iso by nero with 2X,the dvd is dvd-r.When I launch the Gamecube Backuploader 0.2 which has a warning taps"failed to read DVD 266,Error 0*53100 ready".I retring many times and sometimes the warning taps were differences,such as DVD216,236.Somebody can help me which am i go wrong?Thanks a lot.