Different sidebars for certain pages not working.

Hi all, I have this code that is supposed to display certain sidebars in certain pages. I got it from the codex this is my modified version:

<!-- begin sidebar -->
<div class="sidebar">
<?php
// let's generate info appropriate to the page being displayed
if ( is_home() ) {
    // we're on the home page, so let's show a list of all top-level categories
    echo "<ul>";
    wp_list_cats( 'optionall=0&sort_column=name&list=1&children=0' );
    echo "</ul>";
    // we're looking at a single page, so let's not show anything in the sidebar
} elseif ( is_page('') ) {
    // we're looking at a static page.  Which one?
    if ( is_page( '211' ) || '211' ==  $postid->post_parent){
        // our Sacramento Studio page.
			!function_exists('dynamic_sidebar') || !dynamic_sidebar(1);
    } elseif ( is_page( 'San Francisco' ) ) {
		//our San Francisco Page
			!function_exists('dynamic_sidebar') || !dynamic_sidebar(2);
    } else {
        // catch-all for other pages
    echo "<p>OOPS! No Side Bars Defined For This Page.</p>";
    }
} else {
    // catch-all for everything else (archives, searches, 404s, etc)
    echo "<p>OOPS! No Side Bars Defined For This Page.</p>";
} // That's all, folks!
?>
</div>
<!-- end sidebar -->

This code switches between sidebars depending on the page it’s on. I’ve got it to work perfectly until I wanted child pages to display the parent’s sidebar using this particular piece of code:

if ( is_page( 'Sacramento' ) || '211' ==  $postid->post_parent){
        // our Sacramento Studio page.
			!function_exists('dynamic_sidebar') || !dynamic_sidebar(1);

Well that displays the appropriate sidebar in the parent page but not the child pages. Any help is greatly appreciated!

Thanks!