Topic: digital output issue

running fireface 800 to a Mac OSX.( and LOVE the firewire800- works amazingly well)
trying to patch the Fireface 800 front inputs though the digital out (firewire 800 into my MAC) into skype for phone Voice Over sessions. i selected Fireface 800 as the input and output in my skype preferences.
i can hear the other side (of the call's) voice clear as day through my speakers
here is the issue:
input 1 works beautiful. skype picks it up and it sounds great .
BUT all the other inputs don't work....i can still hear them through my analog outputs/speakers but they don't go through the digital firewire 800 output to my MAC...ideas?