Click on Manage Fiche/Catalog Shop

Login to your account

Choose E-Commerce from the menu on the left then Payment Gateway Info

Click the Help button in the upper right hand corner 

Follow the steps as shown 

Close the help tab, you will be taken back to activate your payment gateway 

You will be taken back to the PSNDealer tab.  

In order for the Authorize.net option to appear on the consumer Checkout page, you must activate your account in Dealer Maintenance. On the Payment Gateway Info page, enter your API Login ID and Transaction Key. Click on the SUBMIT button to save your account information. Click on the ACTIVATE button to display the “Authorize.net” option on the consumer Checkout page.