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Error message when you visit a Web site that is hosted on IIS 7.0: "HTTP Error 501.0 – Not Implemented"
Article ID: 942058 - View products that this article applies to.
When you visit a Web site that is hosted on Internet Information Services (IIS) 7.0 in a Web browser, you receive an error message that resembles the following:
Server Error in Application "ApplicationName"
HTTP Error 501.0 – Not Implemented
Description of HRESULT
The page you are looking for cannot be displayed because a header value in the request does not match configuration settings.
This problem occurs because the client sends a request that contains the HTTP verb "TRACE". However, the registry entry that is used to enable this HTTP verb is not configured on the server.
To enable the HTTP verb "TRACE," follow these steps: