I did. This is what I have now.....(still no ads)
<xen:hook name="ad_above_content" />
<xen:if is="!in_array({$contentTemplate}, array('', 'message_page', 'error', 'search_form', 'search_form_post', 'search_form_profile_post', 'search_results', 'register_form', 'login', 'error_with_login'...