Go to the "Network Connections".
In "Network ConnectionS" window, select "Add".
Choose "Point-to-Point Tunneling Protocol (PPTP)" as your connection type and select "Create...".
In next screen, add your gateway address and your VPN username & password, then click "Advanced..."
Note:(Gateway or IP: Too see your server IP address, login here with your username and password.
In advance settings, make sure the settings are the same as what is shown in the picture that is provided. Hit "OK" when done.
In "Editing RapidVPN" window, click on "Save" button.
Now you are ready to use your connection. Click on network icon from tray area -> VPN Connections -> Rapid VPN Connection. Now your connection will start and soon will be established. Enjoy!