Won't play dvds.

So far I have had this problem with 2 dvds. My dvd recorder will not play some dvds. I bought legitimate copies of Pursuit of Happyness, and Superbad. Both times it gets to the main disc menu, but when you press play, the timer on the recorder only gets to 00:02 and then it just stops. My guess is that there is some kind of weird copyright protection on those dvds that stops them from playing in a dvd recorder, but who knows...

• Just got a copy of Superbad from Netflixs and it gets to 2 and won't play.  So I ordered another copy and it does the same thing.  My DVD player is only 2 1/2 years old.  I'm not buying a new one just to see that movie.