请问一下下面的问题是错在哪里呢???
我的系统是2000,麻烦各位了

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 44: 它为成员站点提供单独登录和核心配置文件服务。
Line 45: -->
Line 46: <authentication mode="Windows" />
Line 47:
Line 48: <!-- 授权

Source File: C:\Inetpub\wwwroot\Book_Shop\web.config Line: 46

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Version Information: Microsoft .NET Framework Version:1.1.4322.573; ASP.NET Version:1.1.4322.573