Outlook Accessing from VB.NET hangs web app

[VB6 Guy]

Using Outlook 10 object model in a library used by an ASP.NET application.

when stepping through my code, after creating a new instance of
Outlook.Application, my application hangs. Task Manager shows my instance
created, but any calls to objects cause it to hang.

Dim objOutlook as new Outlook.Application
objOutlook.Session.Logon("", "", false, false) ' hangs here

Additionally, eliminating the Logon step and doing anything else causes it
to hang as soon as I reference an object from the Outlook object model.
Anyone know why?

thank you