The best way to fix the problem is to uninstall your current version of the game and reinstall the newest version. To do this, go to the START menu on your computer. Choose CONTROL PANEL. Click ADD OR REMOVE PROGRAMS. Click on Avatar:Legends of the Arena in the list. Choose REMOVE. Follow the prompts until it's uninstalled. Then, re-download the game from http://www.nickelodeon.com.au/games/avatarlegends and reinstall it on your computer.