My sony DVD Burner DRU830A doesn't recognize either DVD-R or DVD+R DVDs. It is a new burner. I have it for three weeks. The first thing I did when I received it was to download the Firmware. Up until this morning I didn't have any problem with it. I bought this burner specifically because the reviews that I read stated that it didn't have trouble burning any brand of DVDs. I went back to Sony and tried to download an updated firmware. The firmware was SS23. When I tried to install I got a message stating that the firmware was not compatible with the burner. In the burner slot what showed was (Sony!!DWD!RW ERU-931A). anbody have any ideas. . . Thanks. .