Hi,
Okay, I now see what you are saying.. URIs with the zenid fail, ones without it don't.
The module requests that Zen Cart adds the ID if necessary, and everything works fine here so I can't test if Zen Cart is failing to parse the ID or something.
I'm afraid I just don't know what's going on here and without being able to replicate the problem don't know what I can do other than to ask you to get back to me with some feedback about what happens if you change the "true" to "false" for the zen_href_link calls for the successurl and failureurl.
Thanks!
All the best...
Conor




