I am getting this error message when trying to pay by credit card for $1.00 to see if my new installation works.

This transaction cannot be accepted. - Your credit card could not be authorized for this reason. Please correct any information and try again or contact us for further assistance.

I am using a secure domain and configured the 2 configure.php files to enable ssl. I setup authorize.net_AIM in production mode and am using the same login id and transaction key as my other company thats been working with modernbill for 2 years.

Please give me some kind of hint as I am all out of ideas.

Thanks very much