Meridian Unplugged - Powered by MrTechGuy.co.uk Forums Discussion Meridian - Systems DTS HD does not sound right

Hello,
My HD621 Property audio output: Smartlink, Linear PCM: 8ch.
When I set my BD player to output PCM, and I play DVD Essentials there is no surround channel being play. When I set BD player to Bitstream Uncompress there is surround channel being play.
Thanks.