Post what kind of mod you have on your ps2.
I personally have the newest swap magic and a v15 PS2 Soft tool modded. (7700X series ps2, american slim.) I had to bend the metal tab out of the way by the hinge to install the oldschool soft slimtool kit.
My MB:AC and GGXX/ dvds are burned on HP DVD+R Media burned at 2X speed in Nero 7.
They work just fine 99% of the time.