I have a Sony DRU-510a which I have had for a year now and I have never had a problem burning to 1-4x DVD media (I usually buy Ritek 4x). Now I purchased a 50-pack of 8x Ritek not even thinking that it would be a probelm and I can't burn anything, is there an update that I have to do or will this burner only burn to 4x media? I don't understand why it can't burn to the 8x media but not use the full 8x speed, just burn at 4x the speed? Does anyone know if there is anything that I can do or do I have to just continue purchasing 4x media instead of 8x media? Any help would be much appreciaited. Thanks!