Very new user: No audio

 just install my very new WD TV Live streaming media player, and I have no audio. I have a home theater system, with a Yamaha HTR-5140 Surround system, and It works great with my other componets, such as Directv HD DVR, but when I hook up the WD TV Media Player, I get no sound what so ever. I’m so lost and confused. Any help would be great!

You need to share a little more info.

How do you have the SMP connected to your receiver (HDMI, Optical, etc)?

What do you have the Audio setting set to on the SMP?