The Resistance-RO server isn't active anymore which means it has been discontinued, but there is a way to play Rose Online. You can use the official server because the game has been released as free. Access the website and then click on the registration button and fill the form. Make sure to use a real email address and that's it. Download the client, let it update and log-in with your username and password created earlier. Create a character and you'll have the possibility to play the game.