API element no longer working

Hi

We have just updated a site to 3.4.4 and some custom code is now no longer working. This is code taken from the CiviCRM Floss Manual (Working with the API
) to add a list of Contact Groups a contact is in to a contacts summary page.
i.e."The following code adds the list of groups below the list of tags on the contact summary page (CRM/Contact/Page/View/Summary.tpl)

<tr>
<td class="label">Groups</td>
<td id="groups">

{crmAPI entity="group_contact" action="get" var="groups" contact_id=$contactId} {foreach from=$groups item=group}

{$group.title},

{/foreach}

</td>
</tr>"

Olly