Minecraft error

---- Minecraft Crash Report ----
// There are four lights!

Time: 4/7/13 12:41 PM
Description: Failed to start game

java.lang.IllegalArgumentException: Can not set static com.moreexplosives.MoreExplosives field com.moreexplosives.MoreExplosives.instance to portalgun.common.PortalGun
	at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(Unknown Source)
	at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(Unknown Source)
	at sun.reflect.UnsafeStaticObjectFieldAccessorImpl.set(Unknown Source)
	at java.lang.reflect.Field.set(Unknown Source)
	at cpw.mods.fml.common.FMLModContainer.parseSimpleFieldAnnotation(FMLModContainer.java:398)
	at cpw.mods.fml.common.FMLModContainer.processFieldAnnotations(FMLModContainer.java:324)
	at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:418)
	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)
	at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:159)
	at net.minecraft.client.Minecraft.a(Minecraft.java:430)
	at net.minecraft.client.Minecraft.run(Minecraft.java:762)
	at java.lang.Thread.run(Unknown Source)


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 8 (amd64) version 6.2
	Java Version: 1.7.0_17, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 366564440 bytes (349 MB) / 514523136 bytes (490 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -Xms512m -Xmx1024m
	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 v4.5.21.486 Minecraft Forge 6.4.1.436 15 mods loaded, 15 mods active
	mcp [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed
	FML [Forge Mod Loader] (coremods) Unloaded->Constructed
	Forge [Minecraft Forge] (coremods) Unloaded->Constructed
	PortalGun [Portal Gun] (minecraft.jar) Unloaded->Errored
	mod_SmartMoving [Smart Moving] (minecraft.jar) Unloaded->Constructed
	mod_SmartRender [Smart Render] (minecraft.jar) Unloaded->Constructed
	mod_MAtmos [mod_MAtmos] (minecraft.jar) Unloaded->Constructed
	MoreExplosives [More Explosives Mod] (minecraft.jar) Unloaded->Constructed
	BuildCraft|Core [BuildCraft] (buildcraft-A-3.2.2.jar) Unloaded->Constructed
	BuildCraft|Builders [BC Builders] (buildcraft-A-3.2.2.jar) Unloaded->Constructed
	BuildCraft|Energy [BC Energy] (buildcraft-A-3.2.2.jar) Unloaded->Constructed
	BuildCraft|Factory [BC Factory] (buildcraft-A-3.2.2.jar) Unloaded->Constructed
	BuildCraft|Transport [BC Transport] (buildcraft-A-3.2.2.jar) Unloaded->Constructed
	BuildCraft|Silicon [BC Silicon] (buildcraft-A-3.2.2.jar) Unloaded->Constructed
	IC2 [IndustrialCraft 2] (industrialcraft-2_1.111.jar) Unloaded->Constructed
	LWJGL: 2.4.2
	OpenGL: GeForce GT 630/PCIe/SSE2 GL version 4.2.0, NVIDIA Corporation
	Is Modded: Definitely; Client brand changed to 'forge,fml'
	Type: Client (map_client.txt)
	Texture Pack: Atherys_Ascended_x32_1.5_v1.4.zip
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: ~~ERROR~~ NullPointerException: null