There are two different versions of this payment module released by epay for oscommerce; 3.7 and 4.0. Both versions have been converted to work with cre loaded. Unlike many other payment modules with just one files; these modules have several files. If you need help converting any of these to work for you, feel free to contact me.

Admin Set Up
This is the admin set up required for chase paymentech. oscommerce is already certified, you don’t have to go through certification process. Work with your sales representative to get merchant id, bin # and trace id. If you need additional support contact gateway support team.
Error
System Error 9717 Security Information - agent/chain/merchant is missing
Fix
Contact Gateway support to add your IP address to their production database. If you are hosting on godaddy, your IP address will different than the dedicated IP shown in your account because outbound IP address is through the proxy server.
Error
System Error 801 Error validating amount. Must be numerical and greater than 0
Fix
Look for
$process_button_string =
tep_draw_hidden_field('my_customerid', $customer_id) .
tep_draw_hidden_field('my_totalamount', round(($order->info['total'])*100, 0)) .
tep_draw_hidden_field(’my_firstname’, $order->billing['firstname']) .
change
tep_draw_hidden_field('my_totalamount', ($order->info['total'])*100)
to
tep_draw_hidden_field('my_totalamount', round(($order->info['total'])*100, 0))
osCommerce Community Support Forums > Paymentech contribution
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