To use Automatic Activation, you must be working on the computer where Orca3D is installed, and you must not have a Proxy Server. You must have already installed Orca3D on this computer.
You can start Automatic Activation either by clicking "Yes" on the Orca3D activation notice that appears at the startup of Rhino, or by clicking on the Windows START button and navigating to the Orca3D folder, then clicking on the License Manager Utility. The License Manager Utility may also be started from the Orca menu, but note that any changes made to your license will not be effective until you close and re-start Rhino.
Select the "Internet Activate" icon, and then enter your 18 digit License Code from the order email into the box provided. Click Activate.

After a moment, you should see the following screen:

You are given the option to register your license, which makes it easier to help you with any license issues that you may have in the future.
To check on the status of your Orca3D license, select About from the Orca3D menu in Rhino.