Hi Dominic,

Thanks for posting the D6 module.

Unfortunately I'm getting an error when I try to submit my order (the transition from my Drupal site to the Authorize.net server). It's error code 99, which means "The server-generated fingerprint does not match the merchant-specified fingerprint in the x_fp_hash field."

Authorize.net has a help page about response code 99 at https://developer.authorize.net/tools/responsecode99/

Also, is there a newer version of this module I should be using? On my Modules screen, the description of your module is "Authorize.net SIM only OLD UNSUPPORTED." Is there a different one I should download?

Best wishes,
Andrea