Okay, so I've uploaded this *super* simple HTML page here:
It's utilizing LinkedIn's "Sign In" API. View the source. It's two lines of code. Nothing.
I created a home.php file in my child theme directory, and pasted this:
<?php require(CHILD_DIR.'/test.html'); ?>
This means that if you view the source at http://www.medicaldevicesgroup.net/, it's EXACTLY the same as the source at http://medicaldevicesgroup.net/wp-content/themes/medicaldevicesgroup/test.html. The only difference is that the home page is in WordPress, and the other URL isn't.
The home page script, however, doesn't work. WHY???? Help! Thanks.