You must contact Highlander Data Systems for either a beta evaluation keycode or you may purchase a full copy of the application and be given a fully licensed keycode.
Enter the details shown on the email you get from Highlander Data Systems exactly (you can cut and paste each item if you like), and show OAT where your TeleFinder Server application is so it can extract the TeleFinder serial number.
Assuming all is correct, your copy of OAT will be registered.
In order to check the amount of time you have for evaluation, check the About window.