When the next module appears inexplicably locked, it's usually caused by not having the latest version of Flash. You should install the latest version of Flash, clear your browser cache, then open the course in a new, incognito browser window.
- Install the latest version of Flash here: https://get.adobe.com/flashplayer/
- Clear your browser cache and close all open browser windows.
- Open the course in a new browser window.
If you are still having issues, try these options:
- First, double check that Flash was installed correctly by going here and clicking the Check Now button. You may need to close all open browser windows and open a completely new window (not just a new tab) for the installation to complete.
- You could also try a different browser (Internet Explorer, Firefox or Safari).