Am having trouble adding custom recipes

I'm fairly new to bukkit programming and have had a crack at adding some custom recipes to make redstone dust more useful and add some alchemy into the game. However even though everything looks ok in Eclipse when I run bukkit to test it throws these errors:

EDIT: Whoops I found the problem, I checked again and I put a "C" instead of an "R" for redstone in the iron2gold recipe.

Code:

15:35:18 [INFO] [RedstoneAlchemy] Enabling RedstoneAlchemy v1.1
15:35:18 [SEVERE] Error occurred while enabling RedstoneAlchemy v1.1 (Is it up t
o date?)
java.lang.IllegalArgumentException: Symbol does not appear in the shape:67
        at org.apache.commons.lang.Validate.isTrue(Validate.java:103)
        at org.bukkit.inventory.ShapedRecipe.setIngredient(ShapedRecipe.java:96)
 
        at org.bukkit.inventory.ShapedRecipe.setIngredient(ShapedRecipe.java:84)
 
        at me.ShadowExcalibur.RedstoneAlchemy.Recipes.onEnable(Recipes.java:37)
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:217)
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader
.java:365)
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManage
r.java:381)
        at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:265)
        at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:247
)
        at net.minecraft.server.MinecraftServer.i(MinecraftServer.java:296)
        at net.minecraft.server.MinecraftServer.d(MinecraftServer.java:275)
        at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:225)
        at net.minecraft.server.DedicatedServer.init(DedicatedServer.java:140)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:378)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:539)

I really don't know what I've done wrong. The plugin's code is here if it helps:

Code:

package me.ShadowExcalibur.RedstoneAlchemy;
 
import org.bukkit.plugin.java.JavaPlugin;
import java.util.logging.Logger;
 
import org.bukkit.Material;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.ShapedRecipe;
import org.bukkit.plugin.PluginDescriptionFile;
 
public class Recipes extends JavaPlugin{
    public final Logger logger = Logger.getLogger("Minecraft");
    public static Recipes plugin;
 
 
    @Override
    public void onDisable() {
        PluginDescriptionFile pdfFile = this .getDescription();
        this.logger.info(pdfFile.getName() + " Has been disabled! Alchemy will no longer work!");
     
        getServer().clearRecipes();
    }
 
    @Override
    public void onEnable() {
     
        ShapedRecipe gold2diamond = new ShapedRecipe(new ItemStack(Material.DIAMOND, 1));
        gold2diamond.shape("GCG", "RIR", "GCG");
        gold2diamond.setIngredient('I', Material.GOLD_BLOCK);
        gold2diamond.setIngredient('G', Material.GLOWSTONE);
        gold2diamond.setIngredient('R', Material.REDSTONE);
        gold2diamond.setIngredient('C', Material.COAL);
     
        ShapedRecipe diamond2gold = new ShapedRecipe(new ItemStack(Material.GOLD_BLOCK, 1));
        diamond2gold.shape("RRR", "RDR", "RRR");
        diamond2gold.setIngredient('D', Material.DIAMOND);
        diamond2gold.setIngredient('R', Material.REDSTONE);
     
        ShapedRecipe iron2gold = new ShapedRecipe(new ItemStack(Material.GOLD_INGOT, 1));
        iron2gold.shape("RRR", "RIR", "RRR");
        iron2gold.setIngredient('I', Material.IRON_BLOCK);
        iron2gold.setIngredient('C', Material.REDSTONE);
     
        ShapedRecipe ice = new ShapedRecipe(new ItemStack(Material.ICE, 1));
        ice.shape("RRR", "RWR" , "RRR");
        ice.setIngredient('W', Material.WATER_BUCKET);
        ice.setIngredient('R', Material.REDSTONE);
 
        getServer().addRecipe(iron2gold);
        getServer().addRecipe(gold2diamond);
        getServer().addRecipe(ice);
        getServer().addRecipe(diamond2gold);
 
     
        PluginDescriptionFile pdfFile = this .getDescription();
        this.logger.info(pdfFile.getName() + " Version " + pdfFile.getVersion() + " Has been enabled! Redstone dust now has alchemic properties!");
     
    }
}

 

Code:

iron2gold.shape("RRR", "RIR", "RRR");
iron2gold.setIngredient('I', Material.IRON_BLOCK);
iron2gold.setIngredient('C', Material.REDSTONE);

Well, you try to set the ingredient for 'I' and 'C' but you only used 'I' and 'R' in the recipe.