I've created a VB DLL that uses the AcroExch.PDDoc object (VB has the Acrobat.TLB referenced). If I register the VB DLL in MTS, I get a Permission Denied error when calling the DLL from an EXE program. Just in case my VB DLL needed the Acrobat TLB in MTS, I tried to register the TLB in MTS, but it doesn't list any components, so wouldn't register. I have a full version of Acrobat installed. I am able to get this to work on my development system, but not in the production system. It sounds like a typical permissions problem, but I can't see where. Any clues? Thanks!