Hi everybody! Just got my Sony STR-DB790 hooked up to my Sony DVD player via coaxial cable, but I have a problem... The Reciever wont recognise the multichannel sound the DVD player is outputting... If I set it to autodetect, it only finds 2 channel sound... and I have doublechecked that the output from the DVD player is 5.1 sound... The strange thing is that I think it worked for a while... then I wanted to hear what it sounded like in those "Sound Fields" Sony has... and then I couldn't get surround... what's wrong?!