PS1onPSP games ask for disks

MediEvil 1 and 2 both ask for disks at the third level in each game. I have tried three different ISO burners, a differet ID code and 3 types of Firmware. None of them have worked for any of them. I am using 3.71 M33 right now, and using the Popstation easy Gui to convert them.

Does anyone know?

There was literally JUST an update to the firmwares to play multi-disk popsloader.
Go get it it's called 3.71-4

Medievil 1 doesnt need disk 2 :/