You are using Microsoft Internet Explorer
- In the main menu, click on tools and Internet options.
- then select the Tab Security.
- click on the button personnalize the level, and go down to Script.
- the first sub-section is Active Scripting, be sure it is set to Activated.
- Confirm the modification by clicking on Ok.
You are using Firefox
- Go to the menu Edition and click on Preferences.
- a small box appears, then click on the tab Web Fonctionnalities.
You just have to refresh that page and now you can start playing !