I have a Sony RDR-VX500 DVD Recorder. I purchased Sony and Fugi 1x-16x DVD-R media from Best Buy, but my unit will not record on these disks. I can record to 8x DVD's, which is the stated limit in the owners manual. However, Best Buy says they are going to the 1x-16x media or newer, so I won't be able to buy 8x anymore. Is there a fix for the firmware? I tried Sony's site and found no help.