I have a Denon receiver (AVR-X2000) and an Amp (Carver TFM35), I connected pre-out on back of receiver to input on Amp, then connected R/L channels to my speakers, played music from my tv connected to receiver via HDMI, but there was no sound came out. What did I do wrong? Or what I have to do on my receiver setting to make it work? I want listen to music only. Thanks in advance for your help.