Bukkit

What steps will reproduce the problem?
1. Using Minecraft 1.6.4
2. Using Latest Forge / FML for 1.6.4
3. Place RealWeatherHUD.zip into mods folder

What is the expected output? What do you see instead?
MC Client crashes after Loading Splash

What version of the product are you using?
MC 1.6.4

Do you have an error log of what happened?

Description: Initializing game

java.lang.VerifyError: Bad type on operand stack
Exception Details:
  Location:
    mod_RealWeatherHUD.clientConnect(Lnet/minecraft/client/gui/GuiDownloadTerrain;)V @38: invokevirtual
  Reason:
    Type 'net/minecraft/network/packet/Packet200Statistic' (current frame, stack[1]) is not assignable to 'net/minecraft/network/packet/Packet0KeepAlive'
  Current Frame:
    bci: @38
    flags: { }
    locals: { 'mod_RealWeatherHUD', 'net/minecraft/client/gui/GuiDownloadTerrain', '[B', 'net/minecraft/network/packet/Packet200Statistic' }
    stack: { 'net/minecraft/client/gui/GuiDownloadTerrain', 'net/minecraft/network/packet/Packet200Statistic' }
  Bytecode:
    0000000: 122e b600 344d bb00 3659 b700 374e 2d12
    0000010: 19b5 003a 2d2c b500 3e2d 2cbe b500 42b8
    0000020: 0025 b600 482d b600 4d2a 0403 b800 5104
    0000030: b300 53b1

    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Unknown Source)
    at cpw.mods.fml.common.ModClassLoader.loadBaseModClass(ModClassLoader.java:101)
    at cpw.mods.fml.common.modloader.ModLoaderModContainer.constructMod(ModLoaderModContainer.java:483)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
    at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:313)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
    at com.google.common.eventbus.EventBus.post(EventBus.java:267)
    at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:194)
    at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:174)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
    at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:313)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
    at com.google.common.eventbus.EventBus.post(EventBus.java:267)
    at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:105)
    at cpw.mods.fml.common.Loader.loadMods(Loader.java:509)
    at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:181)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:471)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:806)
    at net.minecraft.client.main.Main.main(SourceFile:101)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:27)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Unknown Source)
    at cpw.mods.fml.common.ModClassLoader.loadBaseModClass(ModClassLoader.java:101)
    at cpw.mods.fml.common.modloader.ModLoaderModContainer.constructMod(ModLoaderModContainer.java:483)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
    at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:313)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
    at com.google.common.eventbus.EventBus.post(EventBus.java:267)
    at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:194)
    at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:174)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
    at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:313)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
    at com.google.common.eventbus.EventBus.post(EventBus.java:267)
    at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:105)
    at cpw.mods.fml.common.Loader.loadMods(Loader.java:509)
    at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:181)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:471)

Please provide any additional information below.