It sounds like you are using the 950 properly. I grabbed the manual for the DV-563A, so just to be sure everything is correct there I'd check the following (all under "Initial Settings"):

• Options | SACD Playback: Multi-Ch Area
• Speakers | Audio Output Mode: 5.1 Channel
• Speakers | Speaker Installation: set all to "Large" and Sub to "On"

With those settings, the 563A should play multichannel SACD's back properly. If you then select the 6CH button after being in a multichannel mode and play a multichannel SACD or DVD-A, you ought to have multichannel output. If all of that fails, I'd double-check the cables between the player and processor (make sure some haven't come loose). I'd also try a standard DVD with a 5.1 track to help troubleshoot matters.