使用pageadmin网站运行助手本机调试，无法访问，今天一直出现问题，不知道怎么回事。
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 14: <pages validateRequest="false" enableEventValidation="false" enableViewStateMac="false" viewStateEncryptionMode="Never" />
Line 15: <compilation defaultLanguage="C#" debug="false" />
Line 16: <authentication mode="Forms" />
Line 17: <customErrors mode="Off">
Line 18: <error statusCode="404" redirect="/error404.html" />
上传虚拟主机也不行，求求帮帮忙，看看到底是怎么回事，谢谢了！