Newbie Alert ... Question regarding dialogs

Newbie Alert ... Question regarding dialogs

Greetings,

I am developing my first mobile website using jQuery Mobile. On my index page, I have a link to a calendar which I am opening in a dialog:  
    < a href="#calendar" data-rel="dialog" data-transition="flip">Calendar</a>
The code is located on the index page, enclosed in:
    <div data-role="page" id="calendar">
        Yada, yada, yada
   </div>
My problem is this: when the index page is first accessed, the calendar opens just fine. After that, it does not want to work. I'll click another link, check out another page, everything works ok. Try and return to the calendar again, and the link is a no-go. Even after an index page refresh, I'll have no luck. Has anyone seen this behavior before? My testing options are several browsers and Opera Mobile Simulator ... I don't own a smart phone myself. My thanks in advance for any help you can offer.

Mohair