Payment Plugin: WorldPay
CONFIUGURATION OF WORDPAY ACCOUNT
Login into WorldPay Control Panel http://www.worldpay.com/support/bg/index.php?page=newlogin&c=WW
open "Installations", click on "Edit" button and set "Payment Response URL"
http://example.com/amember/payment/worldpay/ipn(yes, it will allow to work with several websites with just one account).
You also have to enable the callback, by checking the following box: "Payment Response enabled?"
You should also enable the printout of the receipt, by checking the box: "Enable the Shopper Response"
Make a test purchase. After your testing is done, disable Worldpay plugin Testing mode in aMember Control Panel.
HANDLING OF RECURRING TRANSACTIONS IS NOT YET TESTED.