I just tried to play my first DTS laserdisc (Schindler's List) on my Onkyo 797, but I'm not getting any sound. I have the coax output on the player routed through a Pioneer RFD-1 demodulator, which is then hooked up to a coax input on my receiver. I know the demodulator isn't necessary for DTS, but I have both the RF output and coax output routed through it so I only need to use one input on the receiver. The DTS text appears in the receiver display, but the red border that normally appears around it to signal that it's active isn't appearing. All I hear is silence. Can anyone help?