hi guys im facing one problem while integrating worldPay plugin with aMember. i have successfully add WorldPay with aMember and setup the test account at WorldPay. but im facing problem in CallBack Url. aMember provides me a CallBack Url that i need to enter in worldPay admin. i entered this url in "Payment Response URL" and check the check boxes in front of "Payment Response enabled?","Enable Recurring Payment Response", "Enable the Shopper Response " in World Pay admin. Payment is processing after this but the WorldPay is not redirecting the user to my CallBack Url, and giving me error "returned amount empty or = 0" at url - > "https://select-test.worldpay.com/wcc/cardfp" can please anybody help me. regards Ashish Sharma