Could someone please help me out?

I want to extract the audio like I do with any other disc using DVD Audio Extractor, but I’ve recently encountered a problem. With Thor and The Avengers, whenever I pop it in, and try working it, DVD Audio Extractor Freezes on me and I can’t get the 6 separate channels out of it. Is there another way to go about doing this that will fix this problem? I would like to extract the audio into 6 different files in WAV Format that sounds good without too much speech being outside of Channel 3. I’m worried that this may be a new problem that I can’t deal with on my own without some help. What should I do?

P.S. If anyone knows of any further official music that Alan Silvestri released for The Avengers, other then songs on the Intrada Version, please let me know