Ted,
Just to ensure there are no issues between the versions, I uninstalled, and reinstalled 9.0 and 12.6, and made sure they were both in their own share directories. Now, as expected, 9.0 works with MKS SCC, and 12.6 doesn't.
I repeated the process, copied over the two 9.0 DLL's, (retaining a backup of the 12.6 DLL's) and the MKS SCC appears to be working fine. So to this point, all the behavior is the same. I'm going to continue a basic test to see if there are issues with some simple web services, and SOAP and report back.
So the question looming on the horizon... is this a bug? Why is it failing with those two 12.6 DLL's, but ok when using the 9.0 DLLs? And will this ever change, be fixed, etc?? Where does this go from here?
--Brian