HTTP Error 403.1 with WCF service on IIS

I have added an WCF REST endpoint with WebHttpBinding to our existing ASP.NET server hosted on IIS 6. When I make a GET request such as htt开发者_StackOverflow社区p://{server}/cmis.svc/object/{object_id}, the object is returned by the server. But when I make a DELETE request to the same URL, IIS returns 403.1 error (Forbidden: Execute access is denied). I tried setting the Write permission on the Home Directory tab of the website but that didn't help. As you can see from the URL, cmis.svc is at the root of the website.

Any guesses what might be going wrong?

Thanks.

Use Request Filtering on the site to allow the DELETE verb