Facebook open graph object ,,, can't set its properties - ios

Question

I have successfully post the object on my wall with its default values for the properties.
What I need to do now is setting these properties for that object manually through my code.
Here is what I have done:
#protocol OGApple<FBOpenGraphAction>
#property (nonatomic, retain) NSString *url;
#property (nonatomic, retain) NSString *title;
#property (nonatomic, retain) NSString *image;
#property (nonatomic, retain) NSString *description;
#end
#protocol OGEatAction<FBOpenGraphAction>
#property (retain, nonatomic) id<OGApple> apple;
#end
the object "apple" here has four required properties (url, title, image, description) ,,, here is how I set them :
Define the object:
id<OGApple> graphObject = (id<OGApple>)[FBGraphObject graphObject];
Define the action:
id<OGEatAction> action = (id<OGEatAction>)[FBGraphObject graphObject];
set the properties (I have try method 1 and two) none of them set the object property :
Method one:
[graphObject setObject:#"The Game" forKey:#"title"];
[graphObject setObject:#"https://raw.github.com/fbsamples/ios-3.x-howtos/master/Images/iossdk_logo.png" forKey:#"image"];
[graphObject setObject:#"http://samples.ogp.me/267255650070428" forKey:#"url"];
Method two:
graphObject.url = #"http://samples.ogp.me/267255650070428";
graphObject.title = #"Mohammad";
graphObject.image = #"https://raw.github.com/fbsamples/ios-3.x-howtos/master/Images/iossdk_logo.png";
then assign the object to the action:
action.apple = graphObject;
then POST the request
[FBRequestConnection startForPostWithGraphPath:#"me/theapp:eat"
graphObject:action
completionHandler:^(FBRequestConnection *connection,
id result,
NSError *error) {
// handle the result
if(error)
NSLog(#"%#", error);
else
NSLog(#"%#", result);
}];
The request successfully posted and return id = xxxxxxxxxx
But on my timeline the object not take the parameters that I have passed to it!
Did I miss something or need any extra config on a server?
Thanks in advance :)