I am using VS2008 in a Vista Ultimate environment. Here is the complete error message: ”Exception Details: System.Web.HttpException: Session state can only be used when enableSessionState is set to true, either in a configuration file or in the Page directive. Please also make sure that System.Web.SessionStateModule or a custom session state module is included in the “<configuration>\<... section in the application configuration.” NONE of that was the problem! ......