Catch Responsive – menu not see on mobile

I love your Catch Responsive theme and have been using it for my site: www.eventcastlive.ca I am even considering getting the pro version. However, on mobile phones (or even on a desktop with a small window size) while the menu icon (3 bars) is showing, when one clicks on it, there is no menu displayed. The page just slides off to the right and the menu area is blank. Please advise urgently what I can do to make the menu display correctly on mobiles. Thanks,