This problem is caused by not having the latest version of flash running on Firefox or on IE. There are instructions below for Firefox and you you should be able to get IE instructions on the adobe site.
To fix this you will need to download the most recent version of flash. You can do that here:http://www.adobe.com/support/flashplayer/downloads.html
1. Go to Flash Player download page at Adobe.com and download the Flash installer.
2. From the menu at the top of the Firefox window, select File and then select the Exit menu item.
3. Open the file you downloaded (i.e. install_flash_player.exe), then follow the installer's instructions.
4.After you install Flash, start Firefox again. To confirm that Flash installed, open the Tools and then select Add-ons. If the installation was successful, Shockwave Flash will appear as an active item with version number 184.108.40.206
Let us know if you have any questions.