What is your operating system and browser, including version?
OS = Windows Vista Home Premium – 64 bit – Service Pack 2
FireFox – 43.0.1
Internet Explorer (IE)
Thanks for posting the requested information. Flash Player 11.4 is very old (from 2012) and has not been updated with any security fixes. We highly recommend installing the latest version of Flash Player when you're not using the program that requires the older version.
Download the zip file and extract the contents.
Navigate into the 11_4_r402_287 directory. The files you need are flashplayer11_4r402_287_win.exe and flashplayer11_4r402_287_winax.exe
Before running the installers, use the latest uninstaller posted at Uninstall Flash Player for Windows to uninstall whatever current version you have installed.
After you are finished using the 11.4 version, go to get.adobe.com/flashplayer, with both IE and Firefox browsers, to download and install the latest version.