REST service 404 problem in Microsoft MVC 3

To be able to catch the HTTP DELETE on a route you need to add

<remove name="UrlRoutingModule-4.0" />
<add name="UrlRoutingModule-4.0" type="System.Web.Routing.UrlRoutingModule" preCondition="" />
<!-- any other modules you want to run in MVC e.g. FormsAuthentication, Roles etc. -->

under system.webServer in Web.config