In order to set up CardSave you will need three pieces of information: CardSave Merchant ID, CardSave Password and you CardSave PreShared Key.  When you signup with CardSave you will receive an email with the title "New Gateway Account". In that email will be your CardSave Merchant ID and your CardSave Password.  You will then need to log-in to your CardSave account and copy the CardSave PreShared Key field content under the Account Settings section.  Enter all three of these items into the payments section of your eCommerce tab on your website.