Help running ISo\'s on PSP.

I just set up and am using my PSP (1000 series) and I was trying to run Silent Hill: Shattered Memories (ISO) and it gives me an error message. Using the CSo's seems to work. I followed my set up directions for my Pandora Battery and wonder what I'm doing wrong. If anyone knows..Help..lol ThanksHoustonTX224Post Merge: [time]1299270735[/time]
Think things are all right now. I just loaded another ISO and it worked. So maybe I had a bad ISO.

If it really doesn't work, it may be your firmware...Also try these two options:
PSP ISO Compression [TUTORIAL]
PSP 1000-2006 Hacking [TUTORIAL]