iOS Facebook cannot post on another user's wall - ios

Question

I am trying to make a post on another user's wall using another user using FBConnect. I am using the embedded method of the iOS Facebook API (that is, I am forcing the browser to appear inside my app, so I am not leaving the application at all). This method works for posting into the wall of the same user, but doesn't work on the wall of another user.
self.facebook = [[[Facebook alloc] initWithAppId:self.appID andDelegate:self] autorelease];
if ([self.facebook isSessionValid]) {
[self proceedToPost];
}else{
NSArray *permissions = [NSArray arrayWithObjects:#"publish_stream", #"email", #"read_stream", #"manage_pages", nil];
[self.facebook authorize:permissions];
}
- (void)proceedToPost
{
NSMutableDictionary* params = [NSMutableDictionary dictionaryWithObjectsAndKeys: #"aName", #"name",
self.appID, #"app_id",
self.title, #"caption",
self.link, #"link",
#"animateURL", #"picture",
nil];
[params setObject:"my-user-profile-id" forKey:#"to"];
[self.facebook dialog:#"feed" andParams:params andDelegate:self];
}
The problem is that authorization is done as expected, but when trying to actually post, I see an error message in the embedded browser "cannot post to user's wall".
Can anyone help me with this?

Answer 1

Did you request the publish_stream permission from the extended permissions?
From the documentation about publish_stream permission:
Enables your app to post content, comments, and likes to a user's
stream and to the streams of the user's friends. With this permission,
you can publish content to a user's feed at any time, without
requiring offline_access. However, please note that Facebook
recommends a user-initiated sharing model.
http://developers.facebook.com/docs/reference/api/permissions/
You can request permissons like this:
NSArray *permissions = [[NSArray alloc] initWithObjects:
#"publish_stream",
nil];
[facebook authorize:permissions];
[permissions release];