Jay -- One other thought. Perhaps he needs to restart the server after
making the configuration changes? The Apache documentation mentions
that the main configuration files aren't recognized until a restart,
although I'm not sure of the mime.types file is a "main" one or not.
Worth a shot before he continues troubleshooting, at least.

--
Garner R. Miller
ATP/CFII/MEI
Clifton Park, NY =USA=
http://www.garnermiller.com/