Still unable to download FlashPlayer update

I have a Mac OS X Lion 10.7.5.  And I'm running on Safari 6.  I have been trying to download the FlashPlayer update for the Adobe Flash Player Installer 15 for the past week.   When I click on "Install Adobe Flash Player" the download box pops up.  It asks for my password, which I enter the box shakes showing that I entered the wrong password.  I have changed my password for Adobe and my administrator password.  And still nothing.  And I cannot uninstall it as I apparently don't have the correct password.  I have asked for help on this problem last week.  And nobody has been able to help.