I have a Pioneer THX 7.1 tuner and went into the latest StarWars E3 dvd and selected the THX settings. The audio test does not come out of my rear surround or the base. However, during a movie, the sounds do come out of all speakers. And yes the wires are conected in all 7.1 places and the tuner is set to output in THX mode. Does anybody have any ideas on why this is happening? Thanks for your assistance.