Hi. I am developing a Class Library in C# using VS .NET 2002. Exchange Server 2000. I am trying to write a Managed Exchange Server Event Sink (as a class library) in C#. I have been following this tutorial step-by-step: http://www.codeproject.com/csharp/CsManagedEventSinksHooks.asp So far so good....except when it comes down to binding the component to the folder on the Exchange Store. When I do...I get the following error: Microsoft (R) Windows Script Host Version 5.6 Copyright (C) Microsoft Corporation 1996-2001. All rights reserved. New Event Binding created: Event: onsave;ondelete Sink: MyEventSink.ExchEventSink FullBindingUrl: file://./backofficestorage/buyersfund.com/mbx/tom/FaxFailure/reg Event.eml Error Updating Props : -2147221163 Interface not registered Press any key to continue . . .