Hello Tom,
I don't directly see something going wrong over here. (but I could be overlooking something)
Have you also already tried to use the advised support channel for the "NI SoftMotion Axis Interface for EPOS2 Positioning Controller - maxon motor".
On the product page (http://sine.ni.com/nips/cds/view/p/lang/nl/nid/209755) the following link is mentioned as official support channel for this third party add-on:
Please also keep us in the loop about the feedback you receive via these support channels.
This might also help another customer.