msyracuse,
I know what you are trying to do, but taking a different approach will make it work.
Rather than trying to include the calendar via ssi in your navigation page, include your navigation page (via a call) in your default template (or whichever one you use).
You can create a file called "navigation.html" and place it inside your default templates folder. Then call it in your default template with <!--include file="navigation.html"-->
Very convenient because you can change the navigation content without editing your default template.
You can see an example here, however I use a modified Doublecal template with no search or login function. There is no reason search and login shouldn't work, though, with the default template. http://littletonmusic.org
------------------
[This message has been edited by musicvid (edited July 08, 2004).]