@dawn2. Thanks for your question. Please note that there are several existing topics regarding this very question. Have a look here: http://support.michaelgilkes.com/tags/mime
Also, when you post to the forum for assistance, please provide your Joomla version, extension version, and PHP version. I really cannot help you if I don’t have that minimal information. Also, when stating your version, please be precise. For example, instead of saying you have PHP5, state that you have PHP 5.2.9
Thanks