Fb contacts not sync on updation of win 8.1

[WPCentral Question]

Hi all,., I have updated win 8 to win 8.1 on lumia 620.When i login FB app at that time contacts and "Me" automatically sync and update but if i logout from fb then vice versa happens(automatically unsync from fb contacts) . If anybody have any solution .... I m waiting,.,http://forums.windowscentral.com/images/icons/icon11.png