Error message when you visit a Web site that is hosted on IIS 7.0: "HTTP Error 501.0 – Not Implemented"

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SYMPTOMS

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

HRESULT: 0x00000000

Description of HRESULT
The page you are looking for cannot be displayed because a header value in the request does not match configuration settings.

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CAUSE

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.

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RESOLUTION

To enable the HTTP verb "TRACE," follow these steps:

Click Start, click Run, type regedit, and then click OK.
Locate and then right-click the following registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W3SVC\Parameters
Point to New, click DWORD Value, type EnableTraceMethod, and then press ENTER.
Double-click EnableTraceMethod.
In the Value data box, type 1, and then click OK.