Has anyone gotten Amazon.com Unbox videos working on the DSM-520?  I have downloaded The Dark Knight (it was free with purchase of the DVD), and I cannot get it to play.  It works fine on the Vista laptop I downloaded it on, but it says it is an unrecognized format on the DSM-520.  It is WMV9 with DRM, and everything sounds like it should work, but it doesn't.  I have configured Windows Media Player 11 to share it's library and am using that when trying to play.  The file size is 2.87G, in case that is a factor.  I don't want to download more Unbox videos unless there was success.  (BTW, I'm using 1.06 firmware)