the_post_thumbnail() не работает…

add_theme_support('post-thumbnails');

if ( function_exists('add_theme_support') ) {
    add_theme_support('post-thumbnails');
}

function get_thumbnail() {
    if ( function_exists('has_post_thumbnail') && has_post_thumbnail() ) {
        the_post_thumbnail(array(210,60), array('class' => 'attachment-60x60')); // @param: array(height, width)
    } else {
        // via mediathek
        $attachments = get_children( array(
                'post_parent'    => get_the_ID(),
                'post_type'      => 'attachment',
                'numberposts'    => 1, // show all -1
                'post_status'    => 'inherit',
                'post_mime_type' => 'image',
                'order'          => 'ASC',
                'orderby'        => 'menu_order ASC'
                ) );
        foreach ( $attachments as $attachment_id => $attachment ) {
            echo wp_get_attachment_image( $attachment_id, array(210, 60) );
        }

    }
}

<?php get_thumbnail(); ?>

масштаб должен быть 210х60:http://img718.imageshack.us/img718/9156/imgp0360b.jpg
но в результате получается 60х60…
вот: http://img231.imageshack.us/img231/6070/imagexo.jpg