I have purchased a pioneer RS 39 home theatre system.. The manual says the receiver automatically decodes the Digital signals to the associated formats in auto surround mode, but the signal from my SATELLITE box is Dolby, whereas the amplifier does not decode it, I have connected the satellite box to receiver via HDMI in. It just outputs the sound in the Front speakers alone in auto surround mode. I can manually change the modes. but Im concerned about the issue with auto surround feature. Kindly help me with this issue .