Flashplayer 11.3

For MAC:  Can you check to see if you have "enable plug-ins" checked in Safari's preferences dialog, under the security tab? If not, enable it and check.

Else, lets follow below suggestions :

Run the Flash Player Uninstaller as applicable for your machine(i.e.Windows or MAC) and remove flash player.

For MAC : http://helpx.adobe.com/flash-player/kb/uninstall-flash-player-mac-os.html

For Windows : http://helpx.adobe.com/flash-player/kb/uninstall-flash-player-windows.html

Restart the machine.

Download and Re-install Flash Player.

Restart the browser and check.

You might also wanna check the below articles ::

Enabling Flash Player in Internet Explorer 9 : http://forums.adobe.com/thread/885448

ActiveX Filtering in Internet Explorer 9 : http://forums.adobe.com/thread/867968

[Moving the discussion to Flash Player Forum]