Try completely uninstalling Flash Player and then reinstall the latest version. Make sure you follow the instructions at the web site below. If Flash is not completely uninstalled and a corrupt file is left behind then the newly installed Flash Player may not work either. Hope this helps for you as I had the same problem and this method worked for me.
http://kb.adobe.com/selfservice/view...4157&sliceId=2
If you use Internet Explorer, you can also try uninstalling and reinstalling the Shockwave Player. Here is the web site for the uninstaller:
http://www.adobe.com/shockwave/downl...r_Version=MSIE