iOS Facebook SDK 3.2.1 Feed post error - ios

Question

I am working on iOS App and it has a simple facebook sharing functionality, basically it allows you to share a link to this app by posting in feed.
I am using facebook SDK 3.2.1 this way:
NSMutableDictionary *params =
[NSMutableDictionary dictionaryWithObjectsAndKeys:
#"Test tweet", #"name",
#"Test", #"description",
#"http://myapplink.com",
#"link",
#"http://myapppicture.com/picture.jpg",
#"picture",
nil];
[FBWebDialogs presentFeedDialogModallyWithSession:nil
parameters:params
handler:^(FBWebDialogResult result, NSURL *resultURL, NSError *error) {
if (error) {
NSLog(#"Error publishing story.");
} else {
if (result == FBWebDialogResultDialogNotCompleted) {
NSLog(#"User canceled story publishing.");
} else {
NSLog(#"No error!");
}
}
}];
The problem is: when this code runs, it brings up facebook login dialog and after I log in, I see this error on screen: "An error occured. Please try again later".
There's nothing logged in console, but if i close this dialogs, it only logs "User canceled story publishing."
Application settings are very basic - I've setup everything just like facebook asked to do:
http://developers.facebook.com/docs/getting-started/facebook-sdk-for-ios/
My question is: has anybody came across the same problem? what can be possible solution?
Thanks!

Answer 1

Now this was fairly simple and I feel kinda stupid :)
But anyway, I hope this will help anybody who will be in the same problem.
Generally, I solved the problem by adding one more key-value pair to my "params" dictionary - value #"my_facebook_app_id" for key #"app_id".
So the correct dictionary looks like:
NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObjectsAndKeys:
#"11111111", #"app_id",
#"Test tweet", #"name",
#"Test", #"description",
#"http://sometestsite", #"link",
#"http://site.com/testimage.jpg", #"picture",
nil];
Facebook SDK says that app_id key is "Required, but automatically specified by most SDKs" - and even though I provided my app_id via MyApp-Info.plist file, it seems like it was not automatically specified (or I did something wrong).
So if you have the same problem, try adding this #"app_id" key - this should help.