I want to upload a big file about 300M,but it told me HTTP Error 404.13 - Not Found. Errorcode:0x00000000 How can I do?

hi i am facing in running the asp.net pages on iis server 7.0.. please help me out Description: The page you are requesting cannot be served because of the Multipurpose Internet Mail Extensions (MIME) map policy that is configured on the Web server. The page you requested has a file name extension that...