Ys Ark of Napishtim(PSP) problem

I've done a lot of searching but came up with nothing. What happens is that when it says press start in the game menu, well I press start and it freezes, then shuts down. I have a PSP-3000 with 6.35 Pro-B7 CFW. It's probably the rom's fault so if anybody could show me where I could get a proper one or provide any other help, thanks in advance! :)

try disabling plugins or changing the iso driver

or set your CPU Clock to Default or install B8/B9 BETA.

How would you change the driver on Pro-B7? I knew how to do it on prometheus iso loader but I don't use that anymore.

Open the VSH menu by pressing select, and change the UMD ISO Mode to M33, Inferno, or Sony NP9600.

Alright, I made sure my CPU Clock was on default, upgraded to Pro-B9 Beta, tried all drivers and disabled plugins but I got nothing. Any other suggestions?

Could the fact that it's a cso(so it might be too compressed) have anything to do with it?

some games wont run correctly if its too compressed, you could try uncompressing it with umdgen