QT Pro, Win 7, Chrome, Can't Play Trailers

I'm using QT Pro on Win 7 with Chrome and unable to play QT video on websites. Every time I try, it just pops up a window telling me I need to download QT.  I've uninstalled and reinstalled QT and Chrome, and both are at the latest versions, but it still won't work. I'm completely unable, for instance to play videos from trailers.apple.com.  Is there a plugin I need to install?

Also, in the QT preferences browser tab, when I click 'File Types' and 'MIME Settings', nothing happens for either.

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