I know this might sound strange, but try disconnecting everything from the C10 and then toggle the power button a few times and let it sit. You DON'T need to reboot the TwinStore, well at least I didn't.. I had a real strange issue with mine, that required I do the same, to get it to work. Almost like there was a ground issue.

Primary: MD600, MS200 (SpeakerLink to AES), Trinnov ST-2, Ayre V6-xe, Salk SS8 3x LRC.
Secondary: MC600 (whole house).
Zone one: 568.2, G57, MS200, Spatial Hologram M2SE.
Zone 2-6 (Awaiting assignment).