enabling booking causes recursive loop

My site is private, but when I enable booking on events the #_BOOKINGFORM the event detail page just renders the booking form in a loop (thousands of them…) until my server runs out of memory and stops.

I am running the most recent version of the plugin. This is my single event page template:

<h2>When</h2>
#_{l F jS Y}<br /><i>#_EVENTTIMES </i><p>
<p>#_EVENTGCALLINK | iCal
</p>
#_EVENTNOTES</p>
{has_location}
<p>
<h2>Location: </h2><br/>
#_LOCATIONURL<p>#_EVENTGCALLINK | #_EVENTICALLINK

</p>
{/has_location}
<h2> RSVP </h2>
#_BOOKINGFORM
<h2>Who’s Coming</h2>

#_ATTENDEES
<br style=”clear:both” />`

The page I need help with: [log in to see the link]