Unable to play working PSX copies on modded PS2.

[gaston58]

I had my PS2 modded, and I was going through my collection of copied PSX games on them... and some work on the PS2, and some don't. Does anyone know why this would happen? All the games work normally on my PSX.

Also, does anyone know how to use the "Enhanced Features" of the PSX driver on the PS2 with copied PSX games? Each time I try to use them, the game hangs on the PSX logo screen.