EXC_BAD_ACCESS -iPhone Objective c
===

I've been trying this Twitter api stuff and it's really confusing...

I keep getting EXC_BAD_ACCESS bad access with the following code... What is the problem here?

    NSURL *followingURL = [NSURL URLWithString:@"https://api.twitter.com/1/users/lookup.json"];
        // Pass in the parameters (basically '.ids.json?screen_name=[screen_name]')
        
        NSDictionary *parameters = [NSDictionary dictionaryWithObjectsAndKeys:@"159462573", @"user_id", nil];
        // Setup the request
        TWRequest *twitterRequest = [[TWRequest alloc] initWithURL:followingURL
                                                        parameters:parameters
                                                     requestMethod:TWRequestMethodGET];
        // This is important! Set the account for the request so we can do an authenticated request. Without this you cannot get the followers for private accounts and Twitter may also return an error if you're doing too many requests
        [twitterRequest setAccount:theAccount];
        // Perform the request for Twitter friends
        

> [twitterRequest performRequestWithHandler:^(NSData *responseData,
> NSHTTPURLResponse *urlResponse, NSError *error) {

            if (error) {
                // deal with any errors - keep in mind, though you may receive a valid response that contains an error, so you may want to look at the response and ensure no 'error:' key is present in the dictionary
                NSLog(@"%@",error);
            }
            NSError *jsonError = nil;
            // Convert the response into a dictionary
            NSDictionary *twitterGrabbedUserInfo = [NSJSONSerialization JSONObjectWithData:responseData options:NSJSONWritingPrettyPrinted error:&jsonError];
            // Grab the Ids that Twitter returned and add them to the dictionary we created earlier
            NSLog(@"%@", [twitterGrabbedUserInfo objectForKey:@"screen_name"]);
        }];

I separated the line the my code fails on...

What could be causing this Twitter API problem?