Hi! You have a choice of using Both or Apartment depending on the object's scope on the ASP and the way you are going to use it. There is a very good article by Don Box about the threading models (http://www.develop.com/dbox/aspapt.asp), you also can have a look at the Microsoft's articles (http://msdn.microsoft.com/workshop/server/asp/server01242000.asp). Regards, Alex Gorev, Dundas Software.