Thanks for your quick and informative reply.
I enabled the THRU option as you suggested from the Audio Parameters menu of my AVR and sound now works like a charm!
I will also take a look at the links you sent, so thank you for those as well.
The receiver I am using used to be hooked up to a set of 5.1 Sony Surround Sound Speakers.
I purchased the YSP-2200 as I now live in a condo and space is at a premium.
I kept the receiver for a few reasons:
1) I plan on hooking up my Playstation 3 via HDMI and the Soundbar only has three HDMI inputs total.
2) The HDMI cables I have are all shorter ones as all my components are stacked vertically, so I did not at least initially want to purchase new cables.
3) I have a pair of Sennheiser RS-180 Wireless Headphones that I connect to the receiver (I don't see a way to connect these to the Soundbar, but I could be wrong about that).
Thank you again for all of your advice, I appreciate it.