Updated plugin and lost it

I recently updated all my plugins, deactivated what I presumed to be some non-essentials and, perhaps unwisely, deleted a few plugins. I can no longer get a promo working on my homepage slider. I have a the slider coded into the index.php as: <?php echo do_shortcode(‘[promoslider]’); ?>

I’m not experienced with WP. Can you suggest what steps I need to take?

http://www.monsoonbooks.com.sg

http://wordpress.org/extend/plugins/promotion-slider/