Internet explorer and HTML5 games in Lectora

Hi everyone

I am inserting some html5 games (created from templates) into my Lectora courses (Lectora V11.3.1). I am using a web window and choosing Local web-based content for the window source.

When published to Moodle, the game works perfectly when viewed in Firefox or Chrome. However, when trying to view it in Internet Explorer (V10), the game hangs on loading and will not load. As it works OK in FF and Chrome, I am assuming it is some sort of setting in IE that is causing the problems (or just IE itself!). Has any anyone else had a similar experience and managed to resolve it?

Thanks for your help.

Jacki