Have you enabled ASP? Server manager > Roles and Features > IIS > Application Development > ASP or if you a on Windows 10 > Control panel > Programs and featu

Have you enabled ASP? Server manager > Roles and Features > IIS > Application Development > ASP or if you a on Windows 10 > Control panel > Programs and features > Turn Windows Feature on or off https://docs.microsoft.com/en-us/iis/application-frameworks/running-classic-asp-applications-on-iis-7-and-iis-8/classic-asp-not-installed-by-default-on-iis https://docs.microsoft.com/en-us/iis/application-frameworks/... As for debugging, set a breakpoint in visual studio and attach to W3WP process, reload page This question is better asked at https://serverfault.com/ https://serverfault.com/