I am trying to publish a simple web site that originates in VS Web Developer 2008. It works OK on my local machine when I build it and view it in a browser using the VS ASP.NET Development Server. Using the instructions in a Winhost KB article, I copied the files for my site from VS to a directory on the FTP server. When I try to run it on the server, using my www.mydomain.com/application folder name/I get the following error: Configuration Error Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately. Parser Error Message: It is an error to use a section registered as allowDefinition='MachineToApplication' beyond application level. This error can be caused by a virtual directory not being configured as an application in IIS. Source Error: Line 50: ASP.NET to identify an incoming user. Line 51: --> Line 52: <authentication mode="Windows" /> Line 53: <!-- Line 54: The <customErrors> section enables configuration Are there changes I should make changes to the web.config file before copying to the server?