DVD backups with dvd2one and PS2

hi guys

i'm having a lil prob

i ripped triple X with dvd decryptor in file mode

i processed the movie with dvd2one

i burned it to lead data dvd_r

now the weird part is comming

i burn the files with prassi with my pioneer 105, on 1 speed

i burn the files in exact the same way 5 times
2 dvds have skip problems in my ps2 on the final chapters (my ps2 is version 4 with messiah) and 3 are playing ok

Yeah call me a fool to burn it 5 times but i wanna know what the problems is

Thx in advance

Greetz Tazie