I had this error when I browse new web site that site sub from sub

http://sharp.elarabygroup.com/ha/deault.aspx

ha is new my web site

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 61: ASP.NET to identify an incoming user. Line 62: --> Line 63: Line 64: section enables configuration Line 65: of what to do if/when an unhandled error occurs

I note other web site as sub from sub hadn't web.config is that realted with web.config and all subs and domain has one web.config