Seven Media Center Codec Issues

[alaskajoel]

Looking for a little help here...
Just installed 7 Professional (had been using vista home premium) but i'm running into what i'm guessing is a codec problem.
It manifests it self with 1 dvd in particular that stutters at the same spot every time when playing through Media center or Media Player (x86 and x64). However, when I play the DVD with Powerdvd, it plays flawlessly. I've tried removing the dts/dvd codec (turning if off rather, following this post exactly: Windows 7 Media Center (7MC) Codec Configuration Bible - v. 1.9 - The Green Button)

alas, nothing I do can get the blasted thing to play in 7MC! I've also tried reformatting the HD, and simply installing the shark007 codec pack, having ffdshow run everything. Nada. Is there some other trick to getting another codec (such as powerdvd's) to take control of the dvd playback in 7mc or am I stuck with this?
Thanks - I never experienced this problem with Vista media center, but it's really frustrating me!

 

[Shark007]

Using the Shark007 pack, make one click on the SWAP TAB, 'Use PDVD9 codec'.

 

[alaskajoel]

Thanks Shark007-

but still no such luck. Still plays in Powerdvd 9 but not in WMP or WMC.

Any other ideas? Perhaps this is not codec related....But what else could it be?