I wanted to use Authorize.Net as a payment gateway for my website, which uses Zen-Cart, so I tried to set it up. All I was able to get working was card rejection, using Authorize.Net's test numbers. I was never able to get card acceptance to work, using my personal debit card. All their tech support did was point the finger at Zen-Cart. I finally got dusgusted and decided to use another solution, PayPal. I canceled Authorize.Net without running any successful tansactions. Now they have debited my account for $56.14 for using their payment gateway!