BigB840

Hi I am experiencing no sound issue when I use Sony tv apps (Netflix, Amazon,etc.) to my wireless home theater system. I have direct tv , PS3, Samsung 4K dvd, and a Sony Reciever in the hdmi ports of hub, with one hdmi back to tv in hdmi arc port. What am I doing wrong here, all systems show picture on tv and audio functions when selected on Klipsch remote, but when using in tv apps, picture but no sound. Please help. thanks Brian