Crash Report Explosives+ on Minecraft 1.4.5

---- Minecraft Crash Report ----
// Everything's going to plan. No, really, that was supposed to happen.

Time: 02/12/12 01:51 PM
Description: Failed to start game

cpw.mods.fml.common.LoaderException: java.lang.ClassNotFoundException: mod_UpdateManager
    at cpw.mods.fml.common.LoadController.transition(LoadController.java:117)
    at cpw.mods.fml.common.Loader.loadMods(Loader.java:479)
    at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:151)
    at net.minecraft.client.Minecraft.a(Minecraft.java:424)
    at net.minecraft.client.Minecraft.run(Minecraft.java:756)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: mod_UpdateManager
    at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:141)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at cpw.mods.fml.common.ModClassLoader.loadClass(ModClassLoader.java:57)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Unknown Source)
    at cpw.mods.fml.common.ModClassLoader.loadBaseModClass(ModClassLoader.java:87)
    at cpw.mods.fml.common.modloader.ModLoaderModContainer.constructMod(ModLoaderModContainer.java:488)
    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:69)
    at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
    at com.google.common.eventbus.EventBus.post(EventBus.java:268)
    at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:140)
    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:69)
    at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:317)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:300)
    at com.google.common.eventbus.EventBus.post(EventBus.java:268)
    at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:83)
    at cpw.mods.fml.common.Loader.loadMods(Loader.java:478)
    ... 4 more
Caused by: java.lang.NoClassDefFoundError: vazkii/updatemanager/IUpdateManager
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(Unknown Source)
    at java.lang.ClassLoader.defineClass(Unknown Source)
    at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:134)
    ... 32 more
Caused by: java.lang.ClassNotFoundException: vazkii.updatemanager.IUpdateManager
    at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:141)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 36 more
Caused by: java.lang.NullPointerException
    at org.objectweb.asm.ClassReader.<init>(Unknown Source)
    at net.minecraftforge.transformers.EventTransformer.transform(EventTransformer.java:29)
    at cpw.mods.fml.relauncher.RelaunchClassLoader.runTransformers(RelaunchClassLoader.java:178)
    at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:133)
    ... 38 more


A detailed walkthrough of the error, its code path and all known details is as follows:
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-- System Details --
Details:
    Minecraft Version: 1.4.5
    Operating System: Windows 7 (amd64) version 6.1
    Java Version: 1.7.0_05, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 413191896 bytes (394 MB) / 514523136 bytes (490 MB) up to 954466304 bytes (910 MB)
    JVM Flags: 2 total; -Xmx1024M -Xms512M
    AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
    Suspicious classes: FML and Forge are installed
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP v7.23 FML v4.5.2.459 Minecraft Forge 6.4.1.410 13 mods loaded, 13 mods active
    mcp [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed
    FML [Forge Mod Loader] (coremods) Unloaded->Constructed
    Forge [Minecraft Forge] (coremods) Unloaded->Constructed
    mod_CodeChickenCore [CodeChicken Core] (coremods) Unloaded->Constructed
    mod_NotEnoughItems [Not Enough Items] (coremods) Unloaded->Constructed
    mod_UpdateManager [mod_UpdateManager] (Explosives_3.4.jar) Unloaded->Errored
    mod_Armor [mod_Armor] (ArmorStand.zip) Unloaded->Constructed
    mod_Floodgate [mod_Floodgate] (Floodgate.zip) Unloaded->Constructed
    GregsLighting [Greg's Lighting] (GregsLighting.jar) Unloaded->Constructed
    mod_Stackables [mod_Stackables] (More Stackables.zip) Unloaded->Constructed
    mod_ReiMinimap [mod_ReiMinimap] (ReiMinimap.zip) Unloaded->Constructed
    mod_Shelf [mod_Shelf] (Shelf.zip) Unloaded->Constructed
    mod_SpawnerGUI [mod_SpawnerGUI] (Spawner GUI.zip) Unloaded->Constructed
    LWJGL: 2.4.2
    OpenGL: AMD Radeon(TM) HD 6480G GL version 4.1.11156 Compatibility Profile Context, ATI Technologies Inc.
    Is Modded: Definitely; Client brand changed to 'forge,fml'
    Type: Client (map_client.txt)
    Texture Pack: Default
    Profiler Position: N/A (disabled)
    Vec3 Pool Size: ~~ERROR~~ NullPointerException: null