c# - How to resolve HTTP Error 404.2 - Not Found error in my website -

when submitted contact form in website displaying error http error 404.2 - not found page requesting cannot served because of isapi , cgi restriction list settings on web server.

please me how overcome issue.

this issue iis settings. below link should -

http://www.codeproject.com/tips/571514/the-page-you-are-requesting-cannot-be-served