Baffling category-specific sidebar problem

I have the following in functions.php,:

register_sidebar(array(
	'name'=>'sidebar',
    'before_widget' => '<li id="%1$s" class="widget %2$s">',
    'after_widget' => '</li>',
    'before_title' => '<h2 class="widgettitle">',
    'after_title' => '</h2>',
));
register_sidebar(array(
	'name'=>'category-sidebar',
    'before_widget' => '<li id="%1$s" class="widget %2$s">',
    'after_widget' => '</li>',
    'before_title' => '<h2 class="widgettitle">',
    'after_title' => '</h2>',
));

I have the following in category-sidebar.php,:
<?php if ( !function_exists('dynamic_sidebar') || !dynamic_sidebar('category-sidebar') ) : ?>

and I have the following in category.php.:`
<?php get_sidebar(‘category-sidebar’); ?>`

Both “sidebar” and “category-sidebar” show up in the admin interface and I can add different widgets to each one. Nevertheless, when category.php is called, the default sidebar (sidebar.php) is loaded, not category-sidebar.php. I’ve searched the forums and everything I have seems to be correct, but I still get the wrong sidebar for the category template.

Any help would be appreciated.