CSS / JS Drag and Drop quiz.. trouble with IE compatibilty

No worries I have solved this!

I have a bit of an urgent one.. I have made a quiz / game using an array of scripts all mashed together.
It works absolutely fine in Chrome, but IE (as expected) is having trouble with it.

The link:
http://www.healthycoachingforyou.co.uk/keygame2.html

So I just want to know what is stopping the text being displayed in IE once a key has been dragged and dropped..

It must have something to do with a display:none; somewhere along the line, but I have changed and tested with them to no avail.

Sorry but the code is a bit messy,
if you would like me to explain anything further I can.

If you view the page in both browsers and fiddle around with the draggable elements a bit you will see my issue.

Any help or time spent looking is really appreciated, I am at my wits end with this one.

Best Regards,
Pete