Please help, can't play UMD

First off, just to let you know, I have been out of the scene for a very long time now. I don't even know what is going on in the scene even when reading about it. The last time I hacked my psp, if thats what you call it, I downgraded it and then updated it to homebrew 3.02 OE-B.

This is my problem. I have purchased Final Fantasy Tactics and when I load the UMD it loads up fine. But once I actually try to play the game I get an error.

I tried just updated it to ver. 4.05, grabbed it off the official psp site. Even doing that I get an error.

Please help me. I looked everywhere and just can't seem to figure this thing out.

I got it figured out. I just downgraded it to 1.5 :)

You are still better off with custom firmware..

Head up to 4.02 M33 :D (Go to 3.52 M33-4 first)

Reformat flash1 as well.

Wally