D:\ is not accessible incorrect function

Howdy!
Just installed a BENQ 822a (B3IC) In a P4 2.6/512mb on an Abit AI7 board. Ican play DVD movies and read cd-rom as well as burn to cd-rw, but trying to usa dvd+rw i get a "d:\ not accessible incorrect function. I am using the blank disc that came with the drive.
Any idea or suggestions as to what is going on?

does it work with other disks

Have not tried any other dvd+rw. Just figured the one included 'ought ta work.