In order to access this Compatibility Mode in IE11:
1) Access the Menu by pressing the ALT key on your computer keyboard and then click on Tools | Developer Tools. Alternatively, press the F12 key on your computer keyboard.
2) A new pane will appear at the bottom of the screen. In this new pane, select the Emulation Tab.
3) Set "Document mode" to 8.
4) Set "User agent string" to Default (if it is not already set).
The form should now function as intended, and you will see responses from the SPML Provider.