To use the Authorize.net you must first register the Add-On. (6129)
The first step in connecting from Big Business to Authorize.net is Registering.
To Register the Authorize.net Add-On:
1. Go to the Maintenance toolbar, to the Company Card, and click the Upgrade button.
2. Click the Authorize button and the Registration dialog, pictured, will open.
3. Enter your Registration code.
6. Click Continue.
7. Click OK on the Confirmation dialog
8. Click OK to Save the Company Card.
9. Quit and restart Big Business Client.