rpi 3, hifiberry DAC +, volumio And no sound

I have the following:

  • Raspberry PI 3 model B
  • HifiBerry DAC +
  • Volumio Version: 2.129

I connected everything, loaded Volumio. I configured Playback options to use HifiBerry DAC Pro. When I try to play, it shows that it is playing, however no sound coming from the Hifiberry RCA jacks (connected to a Yamaha receiver’s CD input). However, I hear very slight sound coming from my monitor (which is plugged into the RaspBerry HDMI socket).

Playback options set to HifiBerry. Also I see green light on the HifiBerry.

Any help will be greatly appreciated.