PUT and DELETE returns 404 for asp.net webapi in Windows 2008 Server IIS 7 and 7.5

Question

I run into 500 - Internal Server Error when PUT/DELETE with windows 2008 server IIS. The response I get is:

Answer 1

Try turning on custom error by adding

You will see the actual cause of the 500 error when you browse to the API controller, e.g.: http://staging.site.com/api/book.

You will find more clues from the actual exception messages.