Maybe some codec is missing, and i think you are using WMP. Tray another player, VLC is excellent choice, plays EVERYTHINK and its FREE. Thank you.

Your Flash plugin is quite older. You need to update it. Adobe Flash Player 10.3.183.7 (2.94 MB) * http://get.adobe.com/flashplayer/ '''=> When Downloading Plugins Update setup files, Remove Checkmark from Downloading other Optional Softwares with your Plugins (e.g. Toolbars, McAfee, Google Chrome, etc.)''' Update All your Firefox Plugins * https://www-trunk.stage.mozilla.com/en-US/plugincheck/ * http://www.mozilla.com/en-US/plugincheck/ Clear Cookies & Cache * https://support.mozilla.com/en-US/kb/Template:clearCookiesCache Clear the Network Cache * https://support.mozilla.com/en-US/kb/How%20to%20clear%20the%20cache#w_clear-the-cache Check and tell if its working.