I created a new ASP.Net website by Visual Studio 2005. Used language : C# Database: no use Then uploaded by menu "Public website" is get error: (I have delete symbol "<" in code for you view ...) Server Error in '/' Application. -------------------------------------------------------------------------------- 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 24: ASP.NET to identify an incoming user. Line 25: --> Line 26: authentication mode="None"/> Line 27: Line 28: