atelier iris end glitch

Well when ever i beat the final boss and after the scenes with all the characters ends i just see a black screen.
I'm using the old PS2 version.
I tried switching the sound off but it doesn't work.

What are you playing it on? A modded PS2, or an emulator like PCSX2?

Just a normal PS2.

How scratched is it?

It's slightly scratched.

I guess you could try playing it on another PS2 with your memory card.