Burning disks yields black screen

Hi there, I recently installed CFW (Cobra) on my PS3, and it's worked great. I can load ISOs via FTP and all that. But I wanted to burn games onto disks and use those to play my games. However, when I burn the known working PS2 ISO onto a disk and insert it into the PS3, it reads it as a PS2 format disk (as it is), but then loads into a black screen and becomes unresponsive. How can this be?

For the record, I know using the internal HDD is the Optimal way to do it. I just like disks, and I...

Burning disks yields black screen