the last time you used the CD WRtr drive ?.
Or Go to the Nero site and Download the New Nero Express 5.9.28 or somthing its on the right hand side of the nero home page or was last time I looked make sure if you download its the Nero Express. If it is software related either the WinXP restore will work or updating the Nero software.
Call back if you need more help.
When you put a blank CD in the Wtr drive it is normal for the drive to read the disk and flash a few times.