Moved to a different machine and logged in w/CCA.
Tried dragging RingList1.xml to the UC500 and it says something about validating the file and then"this file is not allowed to be uploaded to this device"
If have done this from the original machine that I installed it with, worked fine.
Both machines are are/were on the internal network of the UC500 192.168.10.x
Plenty of space on the flash, I find nothing in the settings related.