Welcome to the forum, Bob!
To help me better understand the issue - when are you not getting audio? When watching TV, blu-ray, or both? Also, are you not getting audio through the TV speakers or through your 5.1 speakers hooked up to the receiver? Also, what cables did you use to hook everything up?
There are a couple of things that come to mind, but knowing what your exact issue is will help narrow it down. It could be that you need to set up the HDMI audio on your receiver (to either play through the receiver speakers or the TV speakers, depending on what you want), or something else.