IE Error: "The content you are trying to view is not supported in the current Document Mode..."

My Captivate 7 project (HTML5) runs just fine on my computer in IE11. My client tried to run it from IE9 and got the following error:

"The content you are trying to view is not supported in the current Document Mode of Internet Explorer. Change the Document Mode to Internet Explorer 9 Standards and try to view the content again. To change the Document Mode, press F12, Click Document Mode:, and then select Internet Explorer 9 Standards."

My guess is that they're running it over their LAN, and IE is subsequently running in quirks mode.

I've changed the metadata in index_SCORM.html from

<meta http-equiv="x-ua-compatible" content="IE=10">

to

<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">

we'll see if that fixes it....