Make sure you're using your ASRT member ID number and not your American Registry of Radiologic Technologists (ARRT) number. With your ASRT member ID number and the last four digits of your Social Security number, you should have no trouble creating your new account.
Your ARRT number will not work on the ASRT website. You can create an ASRT account even if you are not an ASRT member. If you have any questions or concerns, please contact Member Services at 800-444-2778.