WordPress options page help

Hey, trying to get my head around the form functionality. Can’t work out why this wont save. Any hints?

[ Moderator note: please wrap code in backticks or use the code button. Do not use blockquote. ]

<?php
/*
 * Plugin Name: opengraph
 * Description: Enabling your site with Open Graph metabox on posts
 * Version: 0.1
 * Author: user256
 */

add_action('admin_menu', 'ssd_settings'); // register admin menu
add_action('admin_init', 'ssd_form_options');  // register form

function register_mysettings() { // whitelist options
	register_setting( 'ssd_form_options', 'twitterid' );
	register_setting( 'ssd_form_options', 'fb_link' );
}

/** register form fields **/
function ssd_form_options(){
	register_setting('ssd_options_group', 'ssd_global_settings', 'ssd_validate');
    }

/** register menu page **/
function ssd_settings() {
	add_menu_page('Structured Social Settings', 'Structured Social', 'administrator', 'ssd_settings_page', 'ssd_display_settings');
} 

function ssd_display_settings()
{
?>
<div class="wrap">
	<div class="icon32" id="icon-options-general"></div>
		<h2>Socially Structured Data</h2>
<form method="post" action="options.php">
<?php	settings_fields( 'ssd_options_group' );
	do_settings_fields( 'ssd_options_group' ); ?>

<p><strong>Twitter ID:</strong>
                <input type="text" name="twitterid" size="45" value="<?php echo get_option('twitterid'); ?>" />
            </p>
<p><strong>Facebook Page Links:</strong>
    <input type="text" name="fb_link" size="45" value="<?php echo get_option('fb_link'); ?>" />
</p>

      <?php submit_button(); ?>
        </form>
</div>
<?php
}
?>