authorize.net help with oscommerce

I have a heavily modded version of oscommerce ms2.2 I had secure payment processing through securepay and everything worked fine. Then I upgraded to [login to view URL], installed the latest payment module and it doesn't work. It fails to recognize any cc numbers and I don't think it is even getting to authorize.net. If possible I would like to disable the pre-check and go straight to authnet. I realize I will pay higher fees for authorizations but even with the securepay module there were many cards oscommerce did not recognize. I am looking to get this done within a week. Project will be paid upon verification that [login to view URL] is working correctly.