I was trying to get extended live archives working. On a suggestion from Arnaud, I changed my blog URL on the options page to match my home URL. This is a subdirectory.
I'm now getting a 500 server error on the site.
I have access to phpMyAdmin, so I went into the database & wp_options table. I edited the home URL and install URL to http://www.sacredspacedesigns.com/gaiasschool
I'm still getting a 500 error.
Thanks for your help!