Anyone Have problems mulit-cam editing with CS6 & Mac Pro?

I have a Mac Pro 12 core with 24 gig of RAM using CS6.  I am trying to mutli-cam edit with three cameras.  Once I begin to edit in the multi-cam window the clips sputter and sometimes freeze and after a few seconds the sound cuts out.


Playback in the timeline is fine and runs smooth.  But trying to mutli-cam edit is terrible.  Anyone else have this problem or better yet have a solution?

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