What version of Flash Player do you currently have installed? You can check the version installed by going to http://helpx.adobe.com/flash-player.html and click the 'Check Now' button. The version installed (plus browser and OS versions) will display.
If the version installed is not the latest (22.214.171.124) it's possible Apple has blocked access (they do this, not Adobe). If you do not have the latest version, please go to http://get.adobe.com/flashplayer to download and install the latest version.