Notes: To get this shipping method to work you must first sign up for an account here http://www.uspswebtools.com/registration/. The live server will not work until you have had two specific successful transactions on the test server.
Click Here To Submit USPS Tests
Once those have been successful, email USPS at icustomercare@usps.com or call them at 1-800-344-7779 (7:00 AM to 11:00 PM EST daily) and they will activate your account to use the live server.