Gui not opening!? NEED HELP

[Mecblader]

Hello,

i am making a custom furnace in my mod and I have completed it, but i keep getting an error saying:

2013-11-09 18:30:08 [WARNING] [ForgeModLoader] A mod tried to open a gui on the server without being a NetworkMod

 

I have looked at many tutorials about making custom furnaces and custom guis, but i have not bee able to fix the problem.

I would appriciate it if someone could help me figure this out.

My main mod class(please let me know if there is anything else that is needed to figure this problem out):

package mod.xtronius.bc_mod;


@Mod(modid = Reference.MOD_ID, name = Reference.MOD_NAME, version = Reference.VERSION)
public class bc_mod {

@Instance(Reference.MOD_ID)
public static bc_mod instance;
public static bc_mod instance1;

@SidedProxy(clientSide = Reference.CLIENT_PROXY_CLASS, serverSide = Reference.SERVER_PROXY_CLASS)
public static CommonProxy proxy;

private IGuiHandler GuiHandler;

public static Block TestGui;
public static int TestGuiID;
public static Block TestGuiIdle;
public static int TestGuiIdleID;


@EventHandler
    public void preInit(FMLPreInitializationEvent event) {



    	Configuration config = new Configuration(event.getSuggestedConfigurationFile());

        int idI = 4000;
        int idB = 4000;
        
        TestGuiID = config.getBlock("TestGui", idB++).getInt();
        TestGuiIdleID = config.getBlock("TestGuiIdle", idB++).getInt();
        

        config.save();
        
        
    }   
p
    }
    	
    
   
    @EventHandler
    public void init(FMLInitializationEvent event) {
    	
    	  TestGuiIdle = new TestGui(TestGuiIdleID, null, false).setUnlocalizedName("TestGui");
    TestGui = new TestGui(TestGuiID, null, true).setUnlocalizedName("TestGui");
        
     
        
        LanguageRegistry.addName(TestGui, "TestGui");
        GameRegistry.registerBlock(TestGui, ItemBlock.class , "TestGui");
        GameRegistry.registerBlock(TestGuiIdle, ItemBlock.class , "TestGuiIdle");
        GameRegistry.registerTileEntity(TileEntityTestGui.class, "TileEntityTestGui");
   
       }
    	
    @EventHandler
    public void postInit(FMLPostInitializationEvent event) {
    	proxy.registerRenderInformation();
    	proxy.initSounds();
    	GuiHandler guihandler = new GuiHandler();
    }

    public bc_mod() {}

}

 

[GotoLink]

Obviously, you are not a NetworkMod.

Add @NetworkMod.