Dragon API error

Time: 26/11/13 08:00 PM
Description: Exception in server tick loop

java.lang.NoClassDefFoundError: net/minecraft/client/resources/AbstractResourcePack
	at Reika.DragonAPI.Libraries.Java.ReikaObfuscationHelper.<clinit>(ReikaObfuscationHelper.java:102)
	at Reika.DragonAPI.Base.DragonAPIMod.<init>(DragonAPIMod.java:30)
	at Reika.DragonAPI.DragonAPIInit.<init>(DragonAPIInit.java:76)
	at Reika.DragonAPI.DragonAPIInit.<clinit>(DragonAPIInit.java:82)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Unknown Source)
	at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:462)
	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:201)
	at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:181)
	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:112)
	at cpw.mods.fml.common.Loader.loadMods(Loader.java:511)
	at cpw.mods.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:99)
	at cpw.mods.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:350)
	at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:92)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:633)
	at net.minecraft.server.ThreadMinecraftServer.run(ThreadMinecraftServer.java:16)
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.resources.AbstractResourcePack
	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:186)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	... 34 more
Caused by: java.lang.RuntimeException: Attempted to load class bjf for invalid side SERVER
	at cpw.mods.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:50)
	at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:274)
	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:172)
	... 36 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: 1.6.4
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 2799121232 bytes (2669 MB) / 3087007744 bytes (2944 MB) up to 3087007744 bytes (2944 MB)
	JVM Flags: 2 total; -Xms3G -Xmx3G
	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
	CraftBukkit Information:
   Running:
   Failed to handle CraftCrashReport:
java.lang.NullPointerException
	at org.bukkit.Bukkit.getName(Bukkit.java:72)
	at org.bukkit.craftbukkit.v1_6_R3.CraftCrashReport.call(CraftCrashReport.java:19)
	at net.minecraft.crash.CrashReportCategory.func_71500_a(CrashReportCategory.java:106)
	at net.minecraft.crash.CrashReport.func_71504_g(CrashReport.java:58)
	at net.minecraft.crash.CrashReport.<init>(CrashReport.java:40)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:692)
	at net.minecraft.server.ThreadMinecraftServer.run(ThreadMinecraftServer.java:16)

	FML: MCP v8.11 FML v6.4.45.953 Minecraft Forge 9.11.1.953 5 mods loaded, 5 mods active
	mcp{8.09} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed
	FML{6.4.45.953} [Forge Mod Loader] (mcpc.jar) Unloaded->Constructed
	Forge{9.11.1.953} [Minecraft Forge] (mcpc.jar) Unloaded->Constructed
	DragonAPI{release} [DragonAPI] (DragonAPI1.6v7(1).zip) Unloaded
	RotaryCraft{Gamma} [RotaryCraft] (RotaryCraft 1.6v7(1).zip) Unloaded
	Profiler Position: N/A (disabled)
	Is Modded: Definitely; Server brand changed to 'mcpc,craftbukkit,fml,forge'
	Type: Dedicated Server (map_server.txt)