Originally posted by Kevin C Brown:
Ooooo, I think I know this one! 
Philip, remember, that before you switch to the 6 ch input, you *do* have to be in a 5.1 digital mode or you *only* will get the front 2 channels (if you're switching from stereo for example).
OOOOOO... I think KCB is right.

This remedy also includes switching from 5/7 channel Stereo mode to make sure the 6 channel input gets fully engaged.
