Just sign up to finish reading your article (I did) then you cannot read this article unless you are a PRO subscriber. No Thanks!!!
How long after registering did you try to read the article? We give new users a limited time to read the article they registered from if it's behind our paywall. If you tried to read it immediately after registering that should have worked fine. You can send the URL and we can look into why this did not work.
Customer support service by UserEcho