The tag doesn’t work on your page cause that page doesn’t have a doctype. Without it, IE defaults to quirks mode, which is a sort of backwards compatibility mode so that old, badly written sites still display as they did decades ago. Put a valid doctype in there and the page will work as intended.
edit: You can test this by switching rendering modes in the dev tools, just press F12 and switch the rendering mode from Quirks to IE9.
However, it will also make your page render in a completely different, modern engine, in all other browsers too. So you need to upgrade your crap code anyway.
Looks like the code here is proper:
thewilloftheancients.com/sto … ryline.php
So you should just update the other pages so they work with the same design. What kind of system are you running anyway, it looks like you just use a bunch of PHP files each filled with content individually.