I bought this burner in October and have made hundreds of copies of movies using record now version 6 and DVDxcopy express. All the sudden dvdxcopy reads fine and when it writes it gets to 44% and the timer continues but when it is done the disc is only half burned. 1 out of every 2 discs burn fine however. With record now everything worked fine until the same day. It now has problems reading the disc, it will start off at 11:00 minutes and jump back and forth with different times until it is complete. About 3 out of every 5 discs burn fine. Why all the sudden is this happening.