What type of computer are you using and what OS? Please try going into your Flash Player control panel (located with your system's control panels) and make sure that "Allow sites to save information on this computer" in the Storage tab is selected.
I have a Toshiba laptop,and I use Google Chrome for Facebook,
InternetExplorer for all others.
Were you able to make the change in your Flash Player control panel?
Got it, thank you so much! FB couldn't help me,it was so frustrating!