DigitWhiz games require Flashplayer 10 to play. If you see this message you either have an older version of Flashplayer or do not have Flashplayer installed for your current browser. To install Flashplayer click on this link and follow Adobe's installation instructions.
If the Adobe website says that you already have the current version of Flashplayer it is likely that your installation of Flashplayer has become corrupted and you will need to uninstall it and then reinstall the current version from Adobe's website. You can download an uninstaller here.