HTTP Error 404 - File or directory not found

Created a new *.ASP file but it is giving "HTTP Error 404 - File or directory not found". What is need to do?

By Default IIS 6 is lockdown, so you can not run asp, php scripts pages without enabling them in web service extension. Steps to enable ASP
* Click Start->Programs->Administrative Tools->Internet Information Services Manager
* Expand and click Web Service Extensions
* In the right pane, right click Active Server Pages and select Allow