I had the same problem but It turned out that the ActiveMerchant Gem was
doing every request sending the x_test flag on if you set the gateway in
test mode. I added an option to hit the test_url but keep the real
requests in order to get the generate...
I'm having the same problem and I'm going insane!AuthorizeNet has like 3
different sources of information where the generation of erros is
suppose to be done differently. This is what I have. - I'm running Rail
and using ActiveMerchant gem to comunic...