Thanks -- that's very sound and logical advice
I guess I only have an msi packaged with a different model DLL, and I added most of the other DLLs later. I'll try reinstalling the msi that I've got right now, and then removing the pre-packaged DLL and adding only the u350 DLL. If that doesn't work, I could sure use an msi with pre-packaged u350 DLL, or perhaps one with no DLLs at all (if my u350 DLL is really ok). I'll post up again either way...
