copy ps2 games

[celtic]

can anyone help. when i backup my games they dont work my playstation. the orignal and the copy look the same on computer. i have tried nero 6, alcohol 120%, recordnow and all have the same result. using shrink dvd 3.1 the backup movies work on the playstation
i have a pioneer a04 and a07
i have used datasafe, ritek, verbtim
the modchip i think is nero 2.2
and the playstation is version 3
the only disk that worked on it was the ritek