I have a client (www.alleghenynutritionals.com) with an osCommerce Shopping Cart, We have tried several Payment processors including Linkpoint Central & Authorize.net Currently under Authorize.net whenever a customer clicks on the 'Confirm Order' button, the order seems to process correctly, but the customer is returned to the Login Page. When using Linkpoint, when a customer clicks the 'Confirm Order' button the order seems to process correctly but the customer is returned to the Payment Page. No notification as to why these jumps occur. The shopping cart is not emptied either. I believe this is a problem not with the payment modules themselves but the osCommerce installation. We used a template from templateMonster.com. I'm not a newbie, but I'm not well versed in osCommerce. The problem needs to be resolved ASAP.
Any information you could provide would be GREATLY appreciated, Even where to start looking for the problem would be helpful!
Thank you much,