My DVD-RW Sony AccuCORE Disks are not verifying. Beyond that, my Pioneer DVR-105 Superdrive will not recognize the disks after a failed burn. Disk Utility claims no disk has been inserted. I Burned the disks at 1x. I have been unable to find a firmware update that might solve the problem. All the talk about firmware updates for high speed disks was not for the 105 anyway. Having read the many forums on DVD-R's and -RW's, I 've found no answers. Any suggestions out there?