My Pioneer DVR-A08XL has worked fine for several years.  But now it no longer recognizes when I insert a blank CD or DVD to write to.  I get an error message "D:\ is not accessible.  Incorrect function" if I click on the drive in My Computer, and my writing programs, including Roxio and Creative Media Source do not recognize the drive to write to. It has no problem reading commercial discs or discs that I have previously burned.  Likewise, Creative Media Source has no problem recognizing CDs that I rip to my mp3 player.