Ted,
Ok, just tried that. Put copies of those 12.6 DLLs into 9, and I get that same error popping up. I even rebooted to ensure a clean slate. I tried to take it a step further, and just use one or the other DLL versions, and both those tests gave ordinal not found errors. If nothing else, it most definitely indicates the DLLs are not residing in memory. After copying the 9.0 DLLs in my same windows session back over, and running PB 9.0 without rebooting, the MKS SCC connected just fine.
Just to clarify, every time that I'm doing this, I am closing down PowerBuilder, if it doesn't get kicked out by the errors. Once I get that Uplink and Applink error, it kills PowerBuilder completely.
In any case, this seems to suggest that there are issues with the 12.6 DLLs themselves. Would it help if I got you a copy of the SCC DLL for MKS to play with?
--Brian