Try disabling the settings in Flash 56 to ICLID-NO / NAME-NO....make a couple calls in ..then re-enable them...then do a system reset. I had to do this the first time setting up CID on my DVX.

Recently, for whatever reason I lost NAME on CID and the only thing to get it back was to re-initialize the whole system.

I think the software gets glitchy on these units as they age.