Ben,
Make sure you have admin permission on the machine running the
Connection Manager. Or more specifically permission to write to the
project directory under LabVIEW install (default location: C:\Program
Files\National Instruments\LabVIEW 7.0\project\).
The reason is that the SIT Connection
will allow it to be included in the DLL.
Another option is to compile the C source (of S function) into a DLL
and call it using the Call Library Node in LabVIEW. though it may
require you to reengineer the model a bit.
Thanks
SumitG
NI RD