The Event Calendar & Montezuma

Hi Guys

I’m having an issue with the events calendar and the theme montezumo. I like the calendar plugin, and its just what we need for our non profit club. However when activated the calendar does not display and appears to lose its styles etc.

This doesnt occur in twenty twelve / thirteen, so assume its a conflict just with montezumo.

I have tried page and event templates page changes things but just lists a heap of sequential text with no format.

as a css and php ignorant newbie, would someone maybe able to give me some pointers as to what may be broken? I like the theme and would love to get this plugin working.

on a seperate note i also tried to enable WP_Debug and get this in the dashboard at the top when i do

Notice: Undefined property: WP_Query::$tribe_is_event_query in /home/orssc.asn.au/htdocs/test/wp-content/plugins/the-events-calendar/lib/the-events-calendar.class.php on line 2127

Warning: Cannot modify header information – headers already sent by (output started at /home/orssc.asn.au/htdocs/test/wp-content/plugins/the-events-calendar/lib/the-events-calendar.class.php:2127) in /home/orssc.asn.au/htdocs/test/wp-includes/option.php on line 571

Warning: Cannot modify header information – headers already sent by (output started at /home/orssc.asn.au/htdocs/test/wp-content/plugins/the-events-calendar/lib/the-events-calendar.class.php:2127) in /home/orssc.asn.au/htdocs/test/wp-includes/option.php on line 572

Any help would be appreciated!

Steve