A problem occurred with digital copyright protection

I have been backing up my video collection for two months now with both X copy and dvd shrink with no problems. I currently have an hp 2.6 intel celeron with mad dog 8x dvd burner. I tried to burn Elektra and the dvd burner would not read the dvd. I tried playing with windows media player and trough inter actual player. Dvd shrink would'nt read the disk either. I used the dvd shrink earlier in the day with no problems. When trying to open with windows media player an error reads "C00D1163: A problem occurred with digital copyright protection" My question is how could this problem just happen and how do i fix it?