Cimplicity can't read data from CMM321

I have an interesting problem. We are reading data from an isolated network via a CMM321 card. The data goes exactly to the %R registers requested and updates regularly. The problem is the Cimplicity app cannot read anything from those registers. It is reading all the other %R registers via the normal 90-30 Ethernet port. I assumed once the data populated the normal %R registers, Cimplicity would be able to read it with no problem, regardless of how it got there, but it just isn't happening. Any clues as to why this is happening? Thanks in advance.