Has somebody messed around with your Java? I you don't have java the game won't open.

There isn't enough information in your post to offer much useful advice.

What Operating System are you using?
What browser program are you using?
Do you have Java installed? If so, which version?
Have you ever used FlyorDie before? I mean have you had this problem from the start or did FlyorDie just stop working for you?

Assuming that you are using Windows XP with Internet Explorer, Sun Java, Windows updates and reasonable anti-virus and firewall protection, here's my best shot:

1. Clear out any cached Java code as follows:
  Open Control Panel
  Open the Java icon
  Pressing the "Setting..." button in the "Temporary Internet Files"
  Press the "Delete Files..." button and confirm with the "OK" button to clear out temporary Java files
2. Now try getting into FlyoDie again.
3. If that doesn't work, try getting the latest Sun Java update (go to 

http://java.sun.com/javase/downloads/index.jsp

 and select the "Java Runtime Environment (JRE) 6u2" download"), install the update and try again.

Good luck

I found  the best solution for this problem.Download opera.com and get to flyordie through this.People use it and enjoy playing chess.

checker game won't open