FBRequestConnection no respond - ios

Question

I'm making a "FBRequestConnection" to get all the friends that play the game...
When I update the SDK of Facebook to the last one, this stop working. Because It was working before.
I have no respond, no success, no error. Any ideas?
NSString *query = #"SELECT uid FROM user WHERE uid IN (SELECT uid2 FROM friend WHERE uid1 = me()) AND is_app_user = 1";
// Set up the query parameter
NSDictionary *queryParam = [NSDictionary dictionaryWithObjectsAndKeys:query, #"q", nil];
// Make the API request that uses FQL
[FBRequestConnection startWithGraphPath:#"/fql"
parameters:queryParam
HTTPMethod:#"GET"
completionHandler:^(FBRequestConnection *connection,
id result,
NSError *error) {
if (error) {
[self debug:[NSString stringWithFormat:#"Error: %#", [error localizedDescription]]];
} else {
[self debug:[NSString stringWithFormat:#"Result: %#", [result objectForKey:#"data"]]];
}
}];
-(void)fbLogin {
if (!_session.isOpen) {
// create a fresh session object
_session = [[FBSession alloc] init];
// if we don't have a cached token, a call to open here would cause UX for login to
// occur; we don't want that to happen unless the user clicks the login button, and so
// we check here to make sure we have a token before calling open
if (_session.state == FBSessionStateCreatedTokenLoaded) {
// even though we had a cached token, we need to login to make the session usable
[_session openWithCompletionHandler:^(FBSession *session,
FBSessionState status,
NSError *error) {
// we recurse here, in order to update buttons and labels
[[NSNotificationCenter defaultCenter] postNotificationName:#"fbConnected" object:nil];
}];
}
[self populateUserDetails];
}
}
Thanks

Answer 1

Open the session with:
[FBSession.activeSession openWithCompletionHandler:^(FBSession * session, FBSessionState state, NSError * error){
if (!error){
}
}];