The aspX file cannot run in IIS, prompting: The server application is unavailable

The cause of this is probably the current installation. Net Framework installed IIS. Net is not registered with IIS. Just run aspnet_regIIS/I from the.NET command line tool (or in a directory like the following: C:/WINDOWS/Microsoft.NET/Framework/v1.1.4322/aspnet_regiis.exe – I) But note: to unload first, then install, recreated for the application, specific as follows: Uninstall by running aspnet_regIIS /u from the.NET command line tool, install aspnet_regIIS/I, restart IIS, delete the default application, and recreate the site as an application.