1820M digital inputs don't work with cable box, receiver digital outputs?

Question

I just installed an 1820M on an XP-Pro machine (AMD 3800+ X2). Downloaded the optical and coax loopback tests and they work fine. But I can't get it to take digital input from either my Comcast HD-DVR or my Denon AVR-1907 receiver. I know the Comcast DVR digital outputs work - they worked with my receiver and with my old Logitech 5300s.
I've tried everything I can think of:
- take external sync from S/PDIF
- set the optical to ADAT so it doesn't mess up the coax s/pdif input
This seems like such an obvious application. Has anyone gotten it to work?
Thanks

Answer 1

This is my point - the currently active channel does not produce sound through its multiple outputs unless Logic is playing.
So, for example, if I am auditioning different drum grooves from RMX through the multiple outputs (for the purpose of putting effects/processors on the outputs in Logic) this only works when Logic is playing.
Or if, in BFD, I have the direct Snare coming out of one output into an aux, and then a direct Kick coming out and output into another aux, I cannot hear them unless Logic is playing - I can only hear the ambient mic's as these are mapped to Outputs 1-2 which are the initial track you set the multiple output AU up on.
If none of this is something you tend to do, I guess it's hard to understand!
Thanks,
Alex.