Find your book on that page and click the “Register or Login” link with it. Then enter the pin code you received and click the “Activate PIN” button.
On the Create an Account or Login page, enter your username and password, and click Login or, if you don't have an account already, create a new account.
At this point, you should be in the test bank site with your new test bank listed at the top of the page. If you do not see it there, please refresh the page or log out and log back in.