Widgets not working

I’m trying to add widgets to my sidebar, and they’re not showing up. I followed EXACTLY the instructions at digwp.com (“How to Widgetize Your WordPress Theme in 2 Steps”). I added this to my functions.php:

if (function_exists('register_sidebar')) {

	register_sidebar(array(
		'name' => 'Widgetized Area',
		'id'   => 'widgetized-area',
		'description'   => 'This is a widgetized area.',
		'before_widget' => '<div id="%1$s" class="widget %2$s">',
		'after_widget'  => '</div>',
		'before_title'  => '<h4>',
		'after_title'   => '</h4>'
	));

}

Then I added this to sidebar.php:

<div id="widgetized-area">

	<?php if (function_exists('dynamic_sidebar') && dynamic_sidebar('widgetized-area')) : else : ?>

	<div class="pre-widget">
		<p><strong>Widgetized Area</strong></p>
		<p>This panel is active and ready for you to add some widgets via the WP Admin</p>
	</div>

	<?php endif; ?>

</div>

Then I went to admin > appearance > widgets, and dragged two widgets into the sidebar (“Theme My Login” and, just to compare, “Meta”) and clicked “Save.” Actually, I clicked “Save” several times, just to be sure.

But nothing is showing up in the sidebar except the “This panel is active…” notice.

I’m at a loss…what have I not done that is causing this?

(Site is https://www.whodatsocialclub.com…it hasn’t launched, but it’s live so I want to get this straightened out before any traffic starts showing up.)