Authorize.net (92) The gateway no longer supports ...

[LiamScanlan]

I've installed NOPCart, and all looks well until I click the Check Out button. Then I get error 92.

The following errors have occurred.
(92) The gateway no longer supports the requested method of integration.

Here is the code on the Shopping Cart page. The shopping cart displays very nicely. All looks well up to that point.

Code: Select all

<FORM ACTION="https://secure.authorize.net/gateway/transact.dll" METHOD="POST">
      <SCRIPT>
       CheckoutCart();
   </SCRIPT>
   <INPUT TYPE=HIDDEN NAME="x_Login" VALUE="3dBxK8q5V4">
   <INPUT type=submit value="Proceed to payment">
   </FORM>

I'm happy I'm using the correct Login because if I change any digit of it, I get a message "(13) The merchant login ID or password is invalid or the account is inactive."

Is there a newer version of the code that works, or am I completely missing the point? It seems too easy if this were to just work so quickly.
Any help appreciated!

[Koibito]

You can find working code here: http://ereimer.net/nopercart.htm