我的Facebook画廊突然停止了工作

I want to make a FB gallery that gets album images from FB page. A few days ago I have coded it and works fine, but only loaded first 50 albums. Since yesterday, it's not working. When test below code I couldn't get anything from my FB page.

 $string = file_get_contents('http://graph.facebook.com/fbpage/albums?fields=id,count');
echo $string;

But if I changed the url something like,

$string = file_get_contents('http://google.com/')
echo $string;

Then I can get the contents.