CD won't mount - help!

bunner bob

I've got a CDR (burned on a PC) that previously mounted, and now won't. Tried in both iBook and G4 (with Pioneer DVR-107 drive).

Opened Disk Utility and it showed up. Selected it (thinking maybe I could mount it) but the Mount button stayed grayed out.

Is there some trick for mounting reluctant CDs. I'm relieved it's at least showing up - SOMETHING's got to mount it...right?

- Bob
I wondering what ISO format do you setup. If I am right you need to setup iso 9660. That allow any computer to read this CD.