After you submit your registration request, check to the e-mail account you provided during registration. A new user will receive an e-mail registration confirmation. You will need to confirm receipt of that e-mail in order to activate your registration by clicking on the e-mailed link.
After clicking on the e-mailed link your registration will be activated and you will be brought to the “User Profile Update” page where you may change or modify your user information. At that point, you will be able to select the subscription services you desire.