After installing RevMax, if 2Checkout is to be used to accept OpenX advertiser payments, you must go to > plugins > RevMax > Details > 2CheckOut > Settings.

a) 2CheckOut Vendor Id: Enter the name of your 2Checkout merchant account.
b) Secret Word: Enter the secret word that you specified in your 2Checkout account.
c) Accepted Currency: The currency your 2CheckOut account accepts.
d) Skip Landing page: Check box to skip extra order checking, or leave it unselected to allow your customers to review their orders before they proceed to checkout.
e) Enable Single page: When checked the user is forwarded directly to pre populated cc form.
f.) Enable Test: When checked you can submit test orders and perform test transactions.
g) Enable 2CheckOut: When checked, 2CheckOut will be enabled and shown as a option on the advertiser sign up and payment screens.