Hello, I had this posted elsewhere, but thought it would be more pertinent to create a new thread about it.

I have my ecommerce setup to authorized.net in SIM mode, and it will transfer over to authorized.net and take my info, AND charge the credit card, but after you complete your transaction, instead of sending you a confirmation, it throws an error message, which I clipped out of the browser and attached.

I found this URL in the source code:
http://www.website.com/index.php/tools/packages/core_commerce/payme...

and put it in authorized.net as a Default Relay Response URL, it was in the source code being sent over to authorized.net, and still I get the same error.

Please help, have been trying to fix for 2 weeks now, there is very little documentation to tell me if I am doing something wrong...

Much appreciated.