I've found various threads on this, and have tried all sorts of tweaks, but nothing allows the order to go through. Upon hitting 'Confirm Order' it cycles me back to the sign in/register screen. I am working with a fully unmodified version of OSC (the latest version) and the Paymentech module. I have tested other modules and those go through, so I know that the store is functioning properly and SSL is working etc.
Any thoughts on where to look or what to tweak to get this working? Is it an OSC issue or is it a Chase issue?
Any help is appreciated. Thank you for your time.