Verify Password Error

Question

    NSString *NumberToSave = Number.text;
    NSString *PassToSave = Password.text;
    NSString *PassVerify = VerifyPassword.text;

 // Save Settings   
    NSUserDefaults *standardUserDefaults = [NSUserDefaults standardUserDefaults];
    NSString *tmpNum = [standardUserDefaults stringForKey:@"Number"];

    if (tmpNum) {


    }else{
        if ([PassToSave isEqualToString:PassVerify]){
        [standardUserDefaults setObject:NumberToSave forKey:@"Number"];
        [standardUserDefaults setObject:PassToSave forKey:@"Password"];
        [standardUserDefaults synchronize]; 

        }else{
        PassLabel.text = @"Password: Please enter passwords again.";
        }

    }

The app just ends if i type in nothing in the PassVerify textbox why is this ?

Thanks

Mason