Problem with my PX-716A



After I write data to a cdrw or dvdrw, the cd and the dvd will change to read only cd and dvd rom. I use Nero 7 and change back to Nero 6 to see the result. It is the same. I upgrade the firmware to 1.10 and there is no change. Can anyone advice if it is the problem of the drive or something else? Thanks in advance.
F. Hui