I am unable to upgrade my firmware on my Z1.Pioneer has sent me two firmware discs ( GXY1016 ). The first time I tried this procedure I did see the update screen and then the process status bar I watched the percentage of install however never received the update is completed screen. Now after several attempts the system is not responding to the firmware update. I have no problems with watching a movie or burning cd's to the drive. Has this happened to anyone and what is the remedy ?.