Problems with my Tekken 4 backup?

[jojo92]

Hello:
I have a Playstaion2 30001 with a NEo2.2 mod chip and I have a Sony DRU 500 burner ,I did the backup using the Record now guide everything came out perfect and I am also using Verbatim -R dvd discs and I also went by the bootup guide here on this site but when I put in my backup it sounds choppy then stops could my lens need adjusting Im lost is my mod chip the worst it`s the 1 wire solder and it plugs into the USB port I have made 2 more compact disc copys perfect but the DVDs are not working I could use alot of input thank you.