Wonderful. All fixed.
I love the WP community (and the software!).
I found the answer to my own question here:
http://www.tamba2.org.uk/wordpress/site-url/
The install page lists just the ajax_calendar ();portion, I needed the other code for my particular sidebar.
You need to place some code in your sidebar.php
<li><?php ajax_calendar (); ?></li>
