Catch Box Responsive Themes not working in IE9

We have just built a WordPress site using the Catch Box Responsive Theme which runs great in Firefox. When we view it in IE9 it does not open and only shows the background colour. I have tried viewing the demo version on the catchthemes website and even the demo doe not show. I have also checked out the Catch Box Pro version and that too does not open in IE9 Is there a solution or have we wasted a couple of days work?