To become an "owner" of a server, follow these steps:
1. Add the server to your favorites. (Navigate to the server info page and under the Server Name, Game, and IP you will see a link to add it to your favorites)
2. Click "Manage Game Server" under the Server Info heading on your server info page. Alternatively, click the area with your username in the left part of the main navigation and then on "View Servers". Click "Manage" next to your server.
3. Click the claim button, or "Dispute ownership?" if there is already an owner.
4. Follow the instructions on the page that comes up.
5. After you have authenticated successfully, the options on the "Manage" page should be available for you to use.