This evening I was trying to install PHP on our Windows/IIS web server and had some unusual problems develop. It seems that first off a partially installed IIS rewrite engine decided to start causing problems, so I uninstalled it. At this point someone mentioned that our ColdFusion sites were failing so panic set it. After some fiddling I got IIS to at least try using ColdFusion for CFM files, but started to get this error message:

Either the Macromedia application server is unreachable or it does not have a mapping to process this request.

To fix it from here I had to run the remove_all_connectors.bat script then do the iis_connector.bat script to reinstall the connector. Et voila, it started working again. <phew>