|Sony's DVD-RW drives ship with a program called B's recorder gold.|
Check you programs.
B's Recorder Gold
If you do not have the software....
Was the DVD-RW part of the system when you purchased the PC or was it added in?
If it was part of the system then the software should be installed. If not check the CD's that came with the system.
If the drive was added in then find the CD's from the drive and install the software.
Other wise you will need to purchase DVD burning software.
If at first you dont fix it, Try harder!