Flash Player Version 10+ is required
You may have to click the get flash button and select to use the plugin or if it is not installed it will take you to a download page.
Chrome now requires that you enable Flash for specific websites. Press the 3 dot button in the top right of Chrome under the x button. Go to Settings and scroll to the bottom and press Advanced. Go to Content Settings > Flash and under Allow press Add. Enter [*.]fls-online.org and press Add.