But that is a code hack that will break on vb upgrade.
Just go into your plugin manager and select create new plugin.
Select product, "Event Attendance".
Select hook location, "cache_templates".
enter title, Event Attendance: Cache templates
And then enter this code. That should do it.
PHP Code:
if(THIS_SCRIPT == 'calendar')
{
$globaltemplates = array_merge($globaltemplates, array('calendar_roll', 'calendar_rollbit'));
}