Thanks for your reply.
I tried another disc and it worked, but also found that the disc I originaly tried to use does work. I had trouble once again with another image but found if I closed Starburn then restarted it the discs would work. A bit puzzling but as I found a way around the issue I'm happy
Just as a side note, when I tried to use the "Send Error Report" I got the message that it had encountered a problem and had to close the burn image wizard, and the usual send a report to Microsoft message.