I have integrated EPC into my web directory and installed the filter as directed in the instruction file but cannot get the filter to work. The filter is displayed and you can select the category but when the page re-loads it just displays all of the events as if the filter is not applied.
I have uploaded new-calendar.php and the header.php file for my site. The site uses a template system that consists of a header, footer and then the body is a separate file.
That's very odd since the filter shows the correctly selector filter selection after refreshing the page. So I'm really at a loss as what on your page is causing this.
Since it's working on the demo page, the calendar files are functioning normally...
I'd need to access the server and test your calendar page to see what is happening. You can send this information via support ticket.