Problems writing audio CD's..

Like lots of other people on here, I'm using XP and have been writing audio
CD's for years with no problems.

The last day or so writing audio CD's with Media player 10 it says the write
is sucessful but then won't recognise anything is on the CD. I know it's not
the CD's as it's done this 4 times in a row! It's also not an issue with .mp3
compatability as it's the drive that can't read it (or any other CD player).
We have plenty of free space on harddisk and so on..

How can I tell if it's definately the CD-RW that's broken? Hardware system
says the device is functioning correctly.

Thanks in advance