I created a VFP DLL that does some data collection and manipulation from a VFP database and sends the results to a SQL Server table.

I then created an EXE in .NET that uses the VFP DLL. The .NET class is based on the ServiceProcess.Servicebase class and installed on the target machine as a system service running under an Active Directory account with proper network permissions.

I can instansiate the DLL via Windows Script Host on the target machine without error.

However, when the .NET exe (running as a service) tries to instansiate the DLL, I get this error:

Event Type:	Error
Event Source:	PIC Backlog Service
Event Category:	None
Event ID:	0
Date:		10/1/2007
Time:		12:00:27 PM
User:		N/A
Computer:	USBRN-APP04
Description:
Creating an instance of the COM component with CLSID {198730B4-52E8-4DDF-
BF28-915128D5BCB4} from the IClassFactory failed due to the following error:
80004005.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

Why can't I instansiate this DLL this way?