This article will show you how to set your domain names to auto renew if they had previously been set to expire.
Select the domain you wish to edit from the drop down box selector, then click the Manage button.
In the Manage Domain section of the control panel, you will find a Reset to Auto-Renew link. Click the link to enable the domain name to Auto Renew.
The display will now be updated to show that the domain is due to Auto Renew.