The issue and fix has been mentioned in previous posts but is worth repeating here...
Have you tried logging in to the club website (not this forum...the club website itself) prior to attempting to renew? If not, there's your problem. When the switch was made to the new software all passwords were reset to a as a safety measure. To change your password, click on the forgot password link and the system will guide you thru the process. Once done, you should be able to renew your membership.