I had a similar situation while trying to burn ISO's for Mandrake 9 and Redhat 8. The size of the ISO's wouldn't let me use the standard capacity CD's I normally use so I had to go to another type I have that can take more data. I made about 8 coasters before I gave up - I thought the burner died. A few days later, I tried to burn an ISO to a lower capacity CD and it worked fine. I had used the higher capacity media to copy music CD's before and had no problem there, so I tried that again and it worked.
It turns out, the high capacity CD's I was using would take music but not data. I didn't know there was a difference until I turned the aisle at Walmart and found a stack of 50 CD's that specifically said for music only. Then back where the computer stuff is, there's stack of 100 CD's by the same mfgr that stated on the insert Music or DATA.
I bought a pack and burned the Mandrake ISO's and I have a great Linux workstation.
I don't know if this is your issue or not but it worked for me...