Hello, I have a major problem with a website project using visual studio 2005... I upgraded my PC to windows 7 X64, I installed vs 2005. I made sure all components/references matched my old Winxp PC. With all that said... I make no changes to the project. My project works fine in production environment. I publish the unchanged project to my webserver, and I get the following error when accessing the site... [ArgumentNullException: Value cannot be null. Parameter name: type] System.Activator.CreateInstance(Type type, Boolean nonPublic) +7469318 System.Web.Profile.ProfileBase.CreateMyInstance(String username, Boolean isAuthenticated) +79 System.Web.Profile.ProfileBase.Create(String username, Boolean isAuthenticated) +231 System.Web.HttpContext.get_Profile() +107 MasterPage.get_Profile() +17 MasterPage.Page_Load(Object sender, EventArgs e) +563 System.Web.UI.Control.OnLoad(EventArgs e) +99 System.Web.UI.Control.LoadRecursive() +50 System.Web.UI.Control.LoadRecursive() +141 I re-publish from my xp box, the error goes away. The problem occurs on any page that trys to access the Profile object. I have even tried converting site to .net 3.5 in VS 2008, and THE SAME ERROR OCCURS. Something is different when the new PC compiles the DLLs. I suspect it is caused by a slight difference in .NET 2.0 components of windows 7 (which comes with it) I have not found a solution anywhere. Can someone please help me with this?

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Thanks, I have. No bites yet.