Hello Dave,
In order to register your Wildstar beta key you will need an active NC Account. At this time, it does not appear that you have registered an NC Account.
To create an NC Account, visit the following website:
https://secure.ncsoft.com/cgi-bin/playncCreate.pl
The following support article will provide more detailed information on the account creation process, if needed:
Title: Creating an NC Account
URL:
https://help.ncsoft.com/hc/en-us/articles/200365483-Creating-an-NC-Account
Once you have created the NC Account, you should be able to register your Wildstar beta key. To do so, log into your NC Account at the following site:
https://secure.ncsoft.com/cgi-bin/plaync_login.pl
When you have logged into the NC Account, you should be taken to the main account information page. On the right side of this page you should see a large button for Wildstar that says "add game" under the "Add Game" section. Clicking this link will take you to a page where you may enter your Wildstar beta key and create the account.
If you have any trouble creating a new NC Account or registering your key, please reply to this ticket and let us know.
Regards,
Larry
NCSOFT Support Team