Did you perform a "clean Install"?
Thanks for your reply. Since I posted, I used the Adobe Flash Player Uninstaller for OS-X versions 10.6 and later (I have 10.9).
I then re-installed Flash Player 11 for OS-X but lotto.pch.com for instance still won't work and it doesn't say why. Other pch sites just say I need to install Flash Player.
I just noticed that when I click on System Preferences, the Flash Player icon is in the bottom left corner of the page that opens. I think I have Flash Player, but the websites don't think so.
Allow Plug-ins is checked.
Download the full installer: http://fpdownload.macromedia.com/get/flashplayer/current/licensing/mac /install_flash_player_11_osx.dmg
Save it. DO NOT mount it or run it.
Spotlight Search "Flash Player.plugin", search the Mac HD, and trash EVERYTHING that appears.
Go to: Mac HD/Library/Internet Plugins
Verify that the Flash Player.plugin file is not present. If it is, trash it.
Go to: Mac HD/Library/Application Support/Adobe/Flash Player
Verify that neither the Flash Player folder nor the Flash Player Install Manager folder exist. If either does, trash the whole folder
Empty the trash.
THEN mount the DMG and run the installer again.