1. What operating system are you using?(e.g. Windows Vista, Windows 7, Windows 8.1, Mac OS)
2. What browser are you using? (e.g. Internet Explorer, Firefox)
3. Do you have Flash Player installed now?
Windows 7Mozilla firefoxYes, 2012 last update
Happy Connecting. Sent from my Sprint Samsung Galaxy S® 5
It sounds like you've completed the installation successfully, but it's not working in your browser for some other reason.
This is typically caused by third-party add-ons like ad-blocking or anti-tracking plugins, or third party anti-virus/anti-malware tools. If none of that stuff sounds familiar, you might want to make sure you're running a current version of Firefox.
If that doesn't work, you can try refreshing Firefox:
If you're still stuck, then something is corrupted.
I'd check to make sure that the filesystem is in good shape:
Then I would uninstall and reinstall both Firefox and Flash:
Firefox and other NPAPI browsers: