Change or show privacy setting when using Feed Dialog

My app is posting to facebook with help of Feed Dialog, but unfortunately public audience of my post is only-me. When I'm trying to set privacy key in publish params for friends visibility:

 NSMutableDictionary *params =
    [NSMutableDictionary dictionaryWithObjectsAndKeys:
     @"my app_id", @"app_id",
     @"my app name", @"name",
     @"some text.", @"caption",
     @"some more text.", @"description",
     @"web site link", @"link",
     @"some picture link", @"picture",
     @"ALL_FRIENDS", @"privacy",
     nil]; 

So when adding @"ALL_FRIENDS", @"privacy", I receive an error in Dialog window when I try to publish: Error100 (I'm using incorrect privacy parameter). So my question is how can I change this parameter or how can I let user to change it Feed dialog window (I'm using 3.5 facebook SDK). Thanks in advance!