SSL Certificate error when using enom CC options

I have a shared certificate for the main server the domain is hosted on but when trying to use the Enom credit card prossessing option I get an error
wp-admin/admin-ajax.php?action=domainmapping_show_purchase_form&nonce=f734d780ba&tld=com&blog=2& (port 443)

will I need to have a ssl certificate for the domain I am using domain mapping plug on or can the plugin be configured to us the shared certificate?