Active: Activate the payment gateway/Disable the payment gateway .
Test Mode: Decide on whether you'd like to test the gateway out (This means all transactions made within the store will only be considered a test transaction).
Account Number: Input your 2Checkout account number (Also known as SID, vendor ID, merchant ID, account ID). The Account Number can be found in 2Checkout at the "vendor area", located the top-right of the screen.
Secret Word: Input your 2Checkout Secret Word.