Problem Playing DVD's with ATI Radeon 7000/VE

I have a LITE-ON DVDRW burner and 1Ghz AMD, 256M RAM and the ATI 7000 w/64MB. If I remember, it played when I first installed it just fine. Then somehow just stopped playing well at all. What happens is that I out a DVD in and it starts to play and then it stalls, and plays, etc, like a buffering problem. When I rip it to my C drive and play it its fine. I have re-installed my drivers, etc. no change, I went to ATI and didnt see much, I found an upgrade and tried to install but it could not find a valid ATI program, I bought the card from CompUSA so the cd is theirs... any clues?

 

Hey sounds to me like the dvd burner is the problem had the same problem try installing either ace kodec pack or kazaa mega codec pack there free just do a search on them in google or yahoo. also go to lite on website and search for a firmware upgrade for that drive they post them all the time that would be my guess goodluck