CR-RW drive stopped burning

I have a Cyberdrive CW058D CD-RW drive.

Just out of the blue a couple of days ago, it won’t burn discs anymore. Tried with Nero, Record Now, etc…Nothing.

With Nero, I get some kind of “Cannot mount written CD” error when I try to verify the data.

I did install a new DVD-ROM…Could that have messed something up?

I am facing the same problem with my sony vaio. Suddenly it stopped burning giving me the cannot mount cd error after writing the data. I am using NERO to burn CDs. How do I rectify this error?