Hi Hutch,
Got it. The problem is related to this issue: http://support.dotnetnuke.com/project...
Under "Manage Profile" tab, there is a required field that is empty "Email Address" - It causes the form to validate whenever you click on "Authorize User" but it doesn't switch tabs to let you know about that.
So just fill out the "Email Address" under "Manage Profile", this way you will be able to authorize users.
Cheers,
Aderson