This type of page is not served. Description: The type of page you have requested is not served because it has been explicitly forbidden. The extension '.mdf' may be incorrect. Please review the URL below and make sure that it is spelled correctly. I have a link to an mdf file so u can download the mdf file by clicking on the link. this is the url and the file exists there, and there is no typing mistake (remove spaces ) http:// localhost:2234 /PickYourOdds /Admin /Backup /aspnetdb-18-4-2008.mdf any idea? and what if I'm using visual studio?