The invoice module is installed, but must be activated before use.
Go to Components -> ePay Payment Solutions
Press the button ‘Options’ ('Parameters' in earlier versions) to edit the configuration of the module.
Enter your merchant number in the field “Merchant number”. Your merchant number is either a test or production number, and you received it from ePay.
Press ‘Save’ at the top of tha page to save the changes.
Go to Menus -> Main Menu
, and press ‘New’ in the right corner.
Choose ePay Payment Solution
in “Select Menu Item Type”:
Name the menu (e.g. ePay), and press ‘Save’ in the right corner.