Error retrieving Twitter Timeline

I am using AFOAuth1Client in order to Authenticate and then retrieve the Home Timeline of a given Twitter User. However when I run my code I get this error:

Error Domain=AFNetworkingErrorDomain Code=-1011 "Expected status code in (200-299), got 403" UserInfo=0x7fe160ca0070 {NSLocalizedRecoverySuggestion={"errors":[{"message":"Your credentials do not allow access to this resource","code":220}]}, NSErrorFailingURLKey=http://ift.tt/19WaRhi, AFNetworkingOperationFailingURLRequestErrorKey=<NSMutableURLRequest: 0x7fe160ca88c0> { URL: http://ift.tt/19WaRhi }, AFNetworkingOperationFailingURLResponseErrorKey=<NSHTTPURLResponse: 0x7fe160dad9b0> { URL: http://ift.tt/19WaRhi } { status code: 403, headers {
    "Content-Encoding" = deflate;
    "Content-Length" = 94;
    "Content-Type" = "application/json;charset=utf-8";
    Date = "Wed, 31 Dec 2014 20:19:49 UTC";
    Server = "tsa_b";
    "Set-Cookie" = "guest_id=v1%3A142005718900451202; Domain=.twitter.com; Path=/; Expires=Fri, 30-Dec-2016 20:19:49 UTC";
    "Strict-Transport-Security" = "max-age=631138519";
    "x-connection-hash" = 2a42433adec68c7f4e4410d0df3e6713;
    "x-response-time" = 5;
    "x-spdy-version" = "3.1-NPN";
} }, NSLocalizedDescription=Expected status code in (200-299), got 403}

Here is how I am attempting to Authenticate:

SettingsViewController.m

- (void)authenticateWithTwitter  {
    self.twitterClient = [[AFOAuth1Client alloc] initWithBaseURL:[NSURL URLWithString:@"http://ift.tt/nSqRsl"]
                                                             key:@"XXXXXXXXXXXX"
                                                          secret:@"XXXXXXXXXXXX"];

    [self.twitterClient authorizeUsingOAuthWithRequestTokenPath:@"oauth/request_token"
                                          userAuthorizationPath:@"oauth/authorize"
                                                    callbackURL:[NSURL URLWithString:@"floadt://success"]
                                                accessTokenPath:@"oauth/access_token"
                                                   accessMethod:@"GET"
                                                          scope:nil
                                                        success:^(AFOAuth1Token *accessToken, id response) {
                                                            [AFOAuth1Token storeCredential:accessToken withIdentifier:@"TwitterToken"];
                                                            [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"twitterActive"];
                                                            [[NSUserDefaults standardUserDefaults] synchronize];
                                                        } failure:^(NSError *error) {
                                                            NSLog(@"Error: %@", error);
                                                        }];
}

StreamViewController.m

-(void)fetchTweets {
    AFOAuth1Token *twitterToken = [AFOAuth1Token retrieveCredentialWithIdentifier:@"TwitterToken"];
    [self.twitterClient setAccessToken:twitterToken];

    self.twitterClient = [[AFOAuth1Client alloc] initWithBaseURL:[NSURL URLWithString:@"http://ift.tt/YFagLh"] key:@"XXXXXXXXX" secret:@"XXXXXXXXXX"];

    [self.twitterClient registerHTTPOperationClass:[AFJSONRequestOperation class]];
    [self.twitterClient getPath:@"statuses/home_timeline.json" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSArray *responseArray = (NSArray *)responseObject;
        NSLog(@"Response: %@", responseObject);
        [responseArray enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
            tweets = responseArray;
        }];
        [self.tableView reloadData];
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Error: %@", error);
    }];
}