runAllManagedModulesForAllRequests
To support DELETE verbs in MVC4 the webconfig should have runAllManagedModulesForAllRequests defined
If you have an older project (like my project that I started in VS2012 RC) you may need to add this setting or else you’ll get 404 errors.
Here is where I found this info:
http://stackoverflow.com/questions/9692687/webapi-controller-is-not-being-reached-on-delete-command
Note: Make sure to read:
http://www.britishdeveloper.co.uk/2010/06/dont-use-modules-runallmanagedmodulesfo.html