Eboot assistance please

I'm hoping that this is the right place to post this; if not I'm sorry. I am in need of some serious help.

You see, I recently began trying to mod my PSP so that it could play PSX games. I did every thing in this tutorial.

http://forums.afterdawn.com/thread_view.cfm/628073

More specifically, the game I'm trying to get running is Blood Omen: Legacy of Kain. I have a 5.00 m33-6 PSP, the game and postloader as both in the right folders and the game itself appears on my list of games. However; when I start the game up, after the PSX logo, it says that the game cannot be started and gives me an error code. Now, the POPS in the Recovery menu are enabled and other than that I'm lost. Anyone know why that might be? I'd appreciate any kind of help right about now.