We have been struggling with an issue with the ability to upload the web.config to IIS 7.5 via WebDAV. When we try to upload using Windows Explorer client, we get an error stating "The parameter is incorrect." (attached). Using other clients, like BitKinex yields a similar error ("HTTP/1.1 401 Unauthorized" or "HTTP/1.1 400 Bad Request") We are able to modify all of the other files within the directory but not the web.config. Any help is much appreciated. Thanks!