Oscommerce Authorize.net setup

Need some assistance getting the [login to view URL] gateway setup. Oscommerce is setup and the [login to view URL] module is setup with an active SSL certificate. When someone using a valid creditcard for check out selects confirm it is taking us to : [login to view URL] With the message : An error occurred while trying to report this transaction to the Merchant. An e-mail has been sent to the merchant informing them of the error. The following is the result of the attempt to charge your credit card. This transaction has been approved. It is advisable for you to contact the merchant to verify that you will receive the product or service. and the credit card transaction is showing up in [login to view URL]'s webinterface. resolving this one issue is all we need