Ok so, go to Nexon's website and log on to your account. When you're logged in, press the big "Start Game" button. It might tell you to install something. Download and install what it wants you to (there's a link on the page). Then you should be fine. From now on, you can't use your desktop icon to start maple, you have to start it from the website. Maple also wants you to change your password, do it. Don't change more than five account's password on the same computer though, as it may result to IP banning (see Tess' case).