[Help] Crafting Handler

I'm having a huge issue understanding just what I am supposed to do with the crafting handler.

The whole system works perfectly in single player but in multi player the item will show up in the crafting-out box but cannot be moved from there into my inventory.

Here is the code I have so far:

package mod_DefenseGunPack;

import java.util.ArrayList;
import java.util.List;

import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.inventory.ICrafting;
import net.minecraft.inventory.IInventory;
import net.minecraft.inventory.Slot;
import net.minecraft.item.ItemStack;
import net.minecraft.src.ModLoader;
import cpw.mods.fml.common.ICraftingHandler;
import cpw.mods.fml.common.Mod.Item;
import cpw.mods.fml.common.modloader.BaseModProxy;
import cpw.mods.fml.relauncher.Side;
import cpw.mods.fml.relauncher.SideOnly;

public class CraftingHandlerDefenseGun3x3v1 implements ICraftingHandler {

//	private BaseModProxy mod;

    private BaseModProxy mod;

    public CraftingHandlerDefenseGun3x3v1(BaseModProxy mod)
    {
        this.mod = mod;
    }

@Override
public void onCrafting(EntityPlayer player, ItemStack item,
		IInventory craftMatrix) {
	// TODO Auto-generated method stub
	if(item.itemID == 5000) //if item is ItemDefenseGun3x3v1
	{
//			craftMatrix.setInventorySlotContents(5000, item);
		mod.takenFromCrafting(player, item, craftMatrix);
		//player.inventory.addItemStackToInventory(item);
		System.out.println("onCrafting");
	}


}

@Override
public void onSmelting(EntityPlayer player, ItemStack item) {
	// TODO Auto-generated method stub

}

}

public static ICraftingHandler craftingHandlerDG3x3v1 = new CraftingHandlerDefenseGun3x3v1(proxy);

@Init

GameRegistry.registerCraftingHandler(craftingHandlerDG3x3v1);

Can anyone tell me what I'm doing wrong and how I should be doing it?

I got pointed to a guide here: http://www.minecraftforge.net/wiki/How_to_add_an_Achievement

which was helpful in setting it up but not in telling it to do the right thing.

Thanks!