Facebook Feed Plugin issue - facebook

Question

I have used the Social Plugin in the past to place an HTML newsfeed on a website. I'm trying to do the same thing, but I'm not getting the feed to display. In fact, if I visit https://developers.facebook.com/docs/plugins/activity the demo is not displaying. Could this be something with my browser, or a bug in the plugin? Any guidance is much appreciated!!
I have this immediately after the body tag, and I have the html pasted in it's proper place.
<div id="fb-root"></div>
<script>
window.fbAsyncInit = function() {
// init the FB JS SDK
FB.init({
appId : 'YOUR_APP_ID', // App ID from the app dashboard
status : true, // Check Facebook Login status
xfbml : true // Look for social plugins on the page
});
// Additional initialization code such as adding Event Listeners goes here
};
// Load the SDK asynchronously
(function(){
// If we've already installed the SDK, we're done
if (document.getElementById('facebook-jssdk')) {return;}
// Get the first script element, which we'll use to find the parent node
var firstScriptElement = document.getElementsByTagName('script')[0];
// Create a new script element and set its id
var facebookJS = document.createElement('script');
facebookJS.id = 'facebook-jssdk';
// Set the new script's source to the source of the Facebook JS SDK
facebookJS.src = '//connect.facebook.net/en_US/all.js';
// Insert the Facebook JS SDK into the DOM
firstScriptElement.parentNode.insertBefore(facebookJS, firstScriptElement);
}());
</script>
<script>(function(d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) return;
js = d.createElement(s); js.id = id;
js.src = "//connect.facebook.net/en_US/all.js#xfbml=1";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));
</script>