Change sidebar for custom template

I have managed to change my functions.php file to allow me to create multiple sidebars/etc. with widgets here is a small sampling…

<?php
if ( function_exists('register_sidebar') )
    register_sidebar(array(
		'name' => 'Sidebar 1',
        'before_widget' => '<div id="widget-%1$s" class="sidebar-box %2$s">',
        'after_widget' => '</div>',
        'before_title' => '<h3>',
        'after_title' => '</h3>',
    ));
register_sidebar(array(
		'name' => 'Sidebar 2',
        'before_widget' => '<div id="widget-%1$s" class="sidebar-box %2$s">',
        'after_widget' => '</div>',
        'before_title' => '<h3>',
        'after_title' => '</h3>',
    ));

I have also managed to create an about.php template. Now to swap sidebars on this page, I thought it would be as simple as swapping out this line…

<?php include ('sidebar 2.php'); ?>

with

<?php get_sidebar(); ?>

However, that continually returns an error. So I am evidently missing something. Any thoughts?

Thanks