Be careful about your wording as I have to take your words on this technical area. For reasons you are about to read about no HD system allows pass through of HD content unless it's stepped back to standard definition or stereo.

If you are trying to get DTS/5.1 out of your receiver to the speakers that's one thing, but pass through is where we hook up our HDMI from the player to the receiver and want HD audio later in the down stream. That should fail.

Be sure to check you have current HDMI cables and that you are connected from source to the HD audio system. SET UP can be annoying but if you are getting sound out of the TV, the BluRay player is not set correctly.
Bob