Boris,
I have the Denon 3300 so Im sure its the same setup. I have a toshiba SD 1200 DVD player. My setup, Run the S-Video from DVD to the Television. Run a coaxial from DVD to the Receiver (Bitstream on my Denon that passes the DTS/DD to the receiver). Ok, On my reciever, I assign the DVD to the coaxial out on the setup menu. Then you have to go back into your DVD setup menu and assign the audio output to Bitstream, so it knows to pass the DD/DTS to the receiver. You should have 3 options, 2 channel audio, PCM, and Bitstream. Then when you pop in the DVD you need to select which audio you want. Hit DVD on the receiver and you should have sound.