I have a Slingbox Pro-HD connected to a comcast dvr through component and spdif digital coax. My brother is remote viewing using slingplayer, but he can only get 2.0 Stereo. He is using Windows XP and his reciever is a SONY HT-SS360 5.1-Channel Home Theater System connected to his computer through Digital optical. We have gone through the setup and selected digital audio but can't get 5.1. Please help.