iOS JSONModel json instance - ios

Question

I am attempting to use this JSONModel library in an app I'm building. I've been following this article, but for some reason I keep getting (null) when attempting to parse the json string. I was told that it is because I'm not creating a json instance; but it seems to me I am. Below is the code, can anyone see what I'm missing? I'm attempting to use this web service, with these inputs:
emailAddress: wufpakjack#yahoo.com;
password: test;
companyId: 2579;
scheduleDate: 20140415.
myShiftModel.h
#import "JSONModel.h"
#interface myShiftModel : JSONModel
#property (assign, nonatomic) NSString *shiftName;
#property (assign, nonatomic) NSString *shiftStartTime;
#property (assign, nonatomic) NSString *shiftPosition;
#end
dailyViewModel.h
#import "JSONModel.h"
#import "myShiftModel.h"
#protocol dailyViewModel #end
#interface dailyViewModel : JSONModel
#property (assign, nonatomic) int numAvailableXChanges;
#property (strong, nonatomic) NSString *todaysForecast;
#property (assign, nonatomic) int todaysTemperature;
#property (strong, nonatomic) myShiftModel *workShift;
#end
dailyFeed.h
#import "JSONModel.h"
#import "dailyViewModel.h"
#interface dailyFeed : JSONModel
#property (strong, nonatomic) NSArray <dailyViewModel> *workShifts;
#end
mainViewController.m
#import "mainViewController.h"
#import "JSONModelLib.h"
#import "JSONModel+networking.h"
#import "dailyFeed.h"
#interface mainViewController () {
dailyFeed *feed;
}
#end
#implementation mainViewController
- (void)viewDidAppear:(BOOL)animated {
NSString *email = [[NSString alloc]initWithFormat:#"wufpakjack#yahoo.com"];
NSString *pass = [[NSString alloc]initWithFormat:#"test"];
NSString *compID = [[NSString alloc]initWithFormat:#"2579"];
NSString *date = [[NSString alloc]initWithFormat:#"20140415"];
NSString *urlString = [NSString stringWithFormat:#"http://qa.shiftzen.com/ws/schedutils.asmx/GetDailyView?emailAddress=%#&password=%#&companyId=%#&scheduleDate=%#", email,pass,compID,date];
NSLog(#"%#", urlString);
[JSONHTTPClient getJSONFromURLWithString:urlString
completion:^(NSDictionary *json, JSONModelError *err) {
NSError* error = nil;
feed = [[dailyFeed alloc] initWithDictionary:json error:&error];
NSLog(#"shifts: %#", feed.workShifts);
}];
}
#end
Any guidance would be greatly appreciated.
Warmest regards,
DB