To enable the USAePay gateway:

1. In the AspDotNetStorefront admin console, go to Configuration > Site Setup Wizard.
   
   
2. In the Payment Gateway section, click the configure link next to the USAePay entry.
   
   
3. Enter the values you obtained from USAePay for the Live Pin and  Live Source Key.
   
   
   
4. Click Save and Close.
   
   
5. Finally, click the radio button next to USAePay and then click the Save button.