When you say you "formatted", you mean you erased CD-RW disk?
If so, this has no effect on your actual DVD rewriter.
You state it plays DVD's? It is software that actually plays the DVD movie.
Example, I use PowerDVD software to play DVD movies.
The software you use to view DVD movies is not same as to access data
or play CD audio.
You may have changed file associations?
Post more details of your problem.
Meanwhile try this:
Place a data or audio CD in drive.
Place cursor on "My Computer" and double-click
A windows opens detailing your configuration.
Locate the drive in which you placed the CD
Place cursor on it and RIGHT click,
In menu that appears, select "Open"
If a window opens detailing the CD's contents
then NO prob with drive, it is a software issue.