重装了系统打开ms。net为什么会出这种问题？

 

Server Error in '/' Application.

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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 55:            它为成员站点提供单独登录和核心配置文件服务。
Line 56:     -->
Line 57:     <authentication mode="Windows" /> 
Line 58: 
Line 59:       <!--  授权 

Source File: c:\inetpub\wwwroot\counter\web.config    Line: 57

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Version Information: Microsoft .NET Framework Version:1.1.4322.2032; ASP.NET Version:1.1.4322.2032