I'm having a perplexing problem with a new KISS DVD (KISS Symphony) that I am trying to play correctly through my Panasonic S-35 player and Panasonic SA-HE90 reciever. This DVD has Dolby Digital 5.1, Dolby Digital 2.0 and DTS sound available. However, when playing, 5.1 sound automatically is selected on the reciever, but it sounds like a pure stereo signal with no bass effects. The sub is silent until I manually select Dolby 2.0, and then the full effects come in. My mate has no problems with his version of the same DVD on his system, (a high end Kenwood). Now, other music DVDs' like my ELO ZOOM concert play in full 5.1 straight away, no problems. I'm more than a little confused by this, mainly why I have to choose Dolby 2.0 on this sytem to hear the DVD properley, when it clearly is capable of 5.1. Could it be a DVD player inconsistency or something.? (Everything sounds normal when playing the KISS DVD through my computer 5.1 setup to confuse things even more). Any help to restore my sanity greatly appreciated.