I downloaded and installed the AuthorizeAIM contribution.
I have a problem, and have spent two days trying to troubleshoot this on my own.
The problem I have is, when I 'continue' from checkout_shipping.php onto checkout_payment.php, that is after entering credit card information... the *first* time the checkout_payment.php page is displayed, I get a credit card error, "the first four digits of your..." well, if I go ahead and hit 'continue' to proceed, the checkout_payment.php file is displayed again, and the error goes away, and the credit card information comes through, and if I hit 'continue' again, it does process the credit card properly, taking me to my checkout_success.php page. And, the payment does go through Auth.net, as well. The problem is the *first* time the checkout_payment.php page is hit, the credit card error comes up.
Also, if I use a known bad CC#, the cc_validation.php seems to be working, because it will not go beyond the checkout_payment.php page, telling the user their CC is not valid.
So, do you have any idea what might be wrong? I'm suspecting it's either in the authorize_aim.php or the checkout_payment.php. I *thought* I edited my checkout_process.php correctly... might the problem be there?