I have a Sony DVP-S330 I noticed last night that it had problems playing my Oasis "There and Then" concert DVD. The first few chapters would play then when you'd try to skip ahead, it'd just freeze. You could hear the player trying to access the disc. Once I got an error message indicating the DVD itself is dirty. Well it wasn't, nor is it scratched or damaged. I've never had a problem with playing this DVD before and now it just isn't watchable. I popped this disc into the APEX player I have in the living room and it played perfectly. So the problem resides in my DVD player then? What should I do?