you probably need to update flashplayer

Adobe download page.

Be careful to de-select any bundled software they may offer to include with your download.

Direct download links.

These links let you avoid the maze of menus and attempts to install active-x, firefox extensions, browser toolbars, and anti-virus softwares which adobe's website has historically attempted to inflict on you when you just want to download the latest flash installer(s).

Windows/Firefox 64bit : Windows/Firefox : Windows/Internet Exploder 64bit : Windows/Internet Exploder

If one of these is not giving you the most recent version according to the about flash player page, let me know.