Google Calendar

I am attempting to use the Zend Gdata framework to communicate with Google Calendars and am having a problem. If I start a new event like this: $event=$gcal->newEventEntry(), nothing happens. My code simply stops executing at that call. If I replace it with this: $event=new Zend_Gdata_Calendar_EventEntry() my code doesn't stop but I get the an error with this: $event->title = $gcal->newTitle($row->title); The error is "Zend/Gdata/Calendar/Extension/Title.php - no such file or directory". I don't know enough about the Zend Framework to figure this one out! Thanks! Floyd