851s Won't see cd's


I recently bought a 851s and have had no problems with burning dvd’s. I tried to burn a cd using Alcohol 120. It stated it was successful, but it would not read it. I then tried putting in a known good cd but it would still not see it. I have tried numerous different cd’s but same problem. Rebooted several times. It will read dvd’s fine!
I flashed the drive to the latest firmware GA0K(??) but it didn’t help. I then rolled backto GA0H(??) still nothing.

:sad: :sad: :sad:

What am I missing? I need it to read cd’s!!