i had a samsung 850 that i had paired with my old yamaha receiver, that used to say the same thing
its because your not using the sound portion of the hdmi cable
be it at your tv or the outlaw
the dvi connection on the outlaw only supports video, if your tv accepts hdmi audio then some setting is probably off on the tv
i suggest connecting your dvd player's digital audio out (optical or digital coax ) to your outlaw and connect the video out directly to the tv, be sure to set the samsung back to bitstream