Windows Phone 8 or Windows phone 8.1 DP?
Did you try Soft Reset?
[INFO]Soft Reset
press and hold the power button and volume down button for about 10 seconds[/INFO]
Nah in on just windows phone 8 lumia black and i tried soft reset, uninstall app and install app again. Deleted the fb account in email+account and then re install everything.... Still the same