I have configured the authorize.net in my new magento store. I have updated my sandbox api login id, transaction key, merchant md5, and changed the url into "https://test.authorize.net/gateway/transact.dll" for testing. Also i have enabled the test mode and debug mode to track. While placing the order i am receiving the error on alert box "Please enter a transaction ID to authorize this payment.". While checking /var/log/debug.log transaction id (x_trans_id) was in 0.
Can any one help me to troubleshoot this issue.
I am also getting same issue, but i did some thing and it working.
for you reference.