When I log in my facebook, something wrong happened. Normally, the right slide side will appear some ads, but mine is blank. And then I turn to HOME, but nothing is shown. And when I go to "Friends", friends lists are blank too. And I even cannot click "Add friend" button. But I do not get any notification from Facebook as warnning or something like this. I will attach some pics. Does any one also have this problem? Why this happens? Thanks in advance for your answers!