AuthorizenetAIM Payment Module for Freeway

I need someone who can finish my payment module for Authorizenet AIM. However this is for OpenFreeway Shopping Cart at [login to view URL] which is a beefed up version of osCommerce. Integration is supposed to be based on osCommerce Payment Authnet AIM Module but for what I believe is a perfect module, Im still getting Credit Card error at checkout. Im sure it's just one little peice of code that is not right but Im not fully qualified in the payment module department but I'm a shopping cart developer myself. If there's an expert out there who can get this working for me and make it work for refunds and other little improvements that would be great. I have a test account with Authorizenet and can set up Freeway Shopping cart for you to complete the process correctly. I already have Authnet SIM working. Also will need help for future payment module integration for freeway, Zen and osCommerce if you help me solve this problem.