Having trouble creating a ModGUIConfig with a custom category

Question

I'm working on a mod for 1.7.10 Forge that needs a complex config for the user to set up, but only the "general" category shows up (from Configuration.CATEGORY_GENERAL). This is how stuff's being registered:

public class ModGUIConfig extends GuiConfig {
 public ModGUIConfig(GuiScreen guiScreen) {
 super(guiScreen,
 ConfigurationHandler.getConfigElements(),
 Reference.MOD_ID,
 true,
 true,
 GuiConfig.getAbridgedConfigPath(ConfigurationHandler.getConfiguration().toString()));
 }
}
public class ConfigurationHandler {
 public static void init(String configDir) {
 if(configDir != null) {
 File path = new File(configDir + "/" + Reference.MOD_ID + ".cfg");
 configuration = new Configuration(path);
 loadConfiguration();
 }else{
 configDir = "/config";
 }
 }
 
 public static int crop_workers = 1;
 public static String seed_supplier = "greenthumb";
 public static String storage_barn = "MacDonalds";
 public static boolean serverFeatures = false;
 public static String commandOnHarvest = "";
 
 public static final String CATEGORY_FARMING = "Farming";
 private static void loadConfiguration() {
 crop_workers = configuration.getInt("Farm Workers",
 CATEGORY_FARMING, 1, 1, 2048,
 "How many workers should tend to your crops. Should be kept low to preserve game performance. " +
 "[default: 1, min: 1, max: 2048]");
 seed_supplier = configuration.getString("Seed Supplier", CATEGORY_FARMING, "greenthumb",
 "Which seed supplier to connect get seeds from"
 );
 storage_barn = configuration.getString("Storage Barn", CATEGORY_FARMING,
 "MacDonalds",
 "Your crop storage barn");
 serverFeatures = configuration.getBoolean("Server Features", Configuration.CATEGORY_GENERAL, false,
 "Whether or not you want the server-side features of this mod, such as:" +
 "\n Allowing players to trade crops in-game" +
 "\n Allowing servers to execute commands in exchange for crops" +
 "\n Allowing servers to execute a command every time crops are harvested on the farm that the server is connected to");
 commandOnHarvest = configuration.getString("Command on farm harvest", Configuration.CATEGORY_GENERAL, "",
 "Command to execute when crops are successfully harvested on the farm that the SERVER is connected to" +
 "\n This command will execute ANY TIME crops are harvested from the farm, meaning that this can go off constantly if you're using a popular supplier");
 if(configuration.hasChanged()){
 configuration.save();
 }
 }
 
 public static List<IConfigElement> getConfigElements() {
 loadConfiguration();
 ArrayList<IConfigElement> iConfigElements = new ArrayList<IConfigElement>();
 iConfigElements.add(new ConfigElement(ConfigurationHandler.getConfiguration().getCategory(ConfigurationHandler.CATEGORY_FARMING)));
 iConfigElements.add(new ConfigElement(ConfigurationHandler.getConfiguration().getCategory(Configuration.CATEGORY_GENERAL)));
 //System.out.println(""+iConfigElements.toString());
 return iConfigElements;
 }
}

The GUI is built, but the "Farming" category is empty, having no options in it ​

Answer 1

Turns out that category names must be lowercase, the issue was fixed by changing:
public static final String CATEGORY_FARMING = "Farming";
to:
public static final String CATEGORY_FARMING = "farming";