Social Marketing shortcode in template home.php not working

Hi guys,

I’d like to add a Social Marketing ad in my home.php using the do_shortcode() function to promote a free service. Here’s the code I added:

<?php echo do_shortcode(‘[wdsm_ad id=”xxx” class=” “]’:wink:; ?>

But nothing happens. I am running WPMU 3.3.1.

I use a hard coded homepage not a static page or post.

Would be great if you can help me out.