Diagnosing Why Custom Module DLL Doesn't Load

Is there a diagnostic log or other evidence I can look for to determine why a ProjectWise custom module DLL is not loading successfully?

It seems to load successfully when DLLs are stored on local C: drive, but not when stored on a network share folder.  One theory we have is that a Windows security setting might be preventing pwc.exe from loading a DLL from a network location.

Also, is there any way to configure/control whether or not (or when) a custom module DLL is loaded by the client application?

Thanks.

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Bentley\ProjectWise\08.11\CustomModules]