Facebook Authentications return no value!

Dear sir,
I did the app use Facebook login with this code on php method.
////////////////////////////////////////////////////////
if(!empty([facebook_error_code]))
{
sc_error_message(urlencode([facebook_error_msg]));
}
else
{
$auth_type = “facebook”;
[uid] = [facebook_user];
$uphoto = [facebook_photo];
[usr] = [facebook_name];
$login = ‘1’;
sc_set_global($uid);
sc_set_global($login);
sc_set_global($auth_type);
sc_set_global($uphoto);
$logintext = {lang_text_logindone};
$logintext2 = {lang_text_sociallog};
$uphoto_show ="<img src=’".[uphoto]."’ />";
sc_set_global($logintext);
sc_set_global($logintext2);
sc_set_global($uphoto_show);
sc_redir(menu,"","_parent");
}
///////////////////////////////////////////////////////////

Everything is no problem for a year until last week.

There are no value for this variable. everything get blank.
facebook_user
facebook_photo
facebook_name

Could any let me know how to solve this problem. or anyone face same problem as mine?
I try SC9.0 beta on web and it return same.(No value)