You state that you are using firmware version 1.40 in your Pioneer DVR-A09XL, which is the latest firmware. In fact firmware version 1.50 is the latest firmware for the Pioneer DVR-A09XL. Suggest updating your Pioneer DVR-A09XL firmware.
For information concerning your DVD burner firmware visit the CD Freaks Pioneer Forum located at (http://club.cdfreaks.com/forumdisplay.php?f=87). There you will find the latest firmware for your Pioneer DVD Burner. The folks at the CD Freaks Hardware Forum are very knowledgeable and have developed various firmwares that optimize the full potential of your DVD Burner. When visiting the CD Freaks Hardware Forum refer to the â€œRead Firstâ€ sticky posted in the beginning of the Forum for pertinent information.
Also when visiting the CD Freaks Pioneer Forum note which DVD media other Pioneer DVD Burner owners report that is good reliable DVD media to use in your DVD Burner.
Could you provide some information on your desktop stand-alone DVD player. What is the manufacture brand name and model number.