I recently purchased a Pioneer Vsx-1122-k receiver and am having a little issue with the sound when watching 3d movies. When I play 3d movies via my Samsung 3d BD player the sound defaults to "stereo" on my receiver. I have my 3d player hooked up with a HDMI cable and that's all. Just wondering if someone can help me achieve / activate the surround sound. I am kinda a newbie at audio systems so any help would be appreciated.