thank you for sending over the HTML file of the quiz that does not display. It appears that Internet Explorer does not like the following <!DOCTYPE> tag near the top of the quiz:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "xhtml11.dtd">
If you remove this tag, the quiz will display correctly in IE.
Interestingly, the quiz is visible on some other browsers, e.g. Firefox.
If you try running the quiz via the HotPot from the XML file (the file on your PC with the ".jqz") instead of the HTML file, I think it will work. Please try it out, and if you have time, let us know how you get on.
all the best