I just got my Co-Star yesterday and hooked it up. I ran through all of the setup and everything works great except it is not not outputting DD 5.1. I looked at the users manual and it says there is an option in the Settings>Audio menu for HDMI Out. Problem is that option is not there. Just to clarify I have gone through numerous troubleshooting steps. I have a Directv HR22-100 connected to the Co-Star via HDMI. The Co-Star is then connected to my Vizio xvt3d554st also via HDMI. From there I have an optical out cable from the tv to my Sony Str-dg520 receiver. If I remove the Co-star from the equation (Directv box connected directly to the TV) I get full DD 5.1. It's only when I add the Co-Star that I loose the DD 5.1. I also tried replacing the HDMI cable between the Directv box and the Co-Star but it didn't help. Any Ideas?