Most likely causes:

• The request sent to the Web server used an HTTP verb that is not allowed by the module configured to handle the request.
• A request was sent to the server that contained an invalid HTTP verb.
• The request is for static content and contains an HTTP verb other than GET or HEAD.
• A request was sent to a virtual directory using the HTTP verb POST and the default document is a static file that does not support HTTP verbs other than GET or HEAD.

Things you can try:

• Verify the list of verbs enabled for the module handler this request was sent to, and ensure that this verb should be allowed for the Web site.
• Check the IIS log file to see which verb is not allowed for the request.
• Create a tracing rule to track failed requests for this HTTP status code. For more information about creating a tracing rule for failed requests, click here.

Detailed Error Information:

More Information:

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