To enable the USAePay gateway:

1. In the AspDotNetStorefront admin console, go to the Site Configuration Wizard page.

2. In the Payment Gateway section, click the 'configure' link next to the USAePay entry.

3. Put in 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 'Submit' button.