16:34:39 [SEVERE] A fatal exception occurred during the server starting event
cpw.mods.fml.common.LoaderException: java.lang.NoClassDefFoundError: net/minecraft/client/multiplayer/WorldClient
	at cpw.mods.fml.common.LoadController.transition(LoadController.java:147)
	at cpw.mods.fml.common.Loader.serverStarting(Loader.java:741)
	at cpw.mods.fml.common.FMLCommonHandler.handleServerStarting(FMLCommonHandler.java:314)
	at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:244)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:588)
	at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)
Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/multiplayer/WorldClient
	at CustomLAN.CustomLAN.registerCommands(CustomLAN.java:185)
	at CustomLAN.CustomLAN.onServerStarting(CustomLAN.java:106)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:494)
	at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	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:314)
	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:192)
	at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:172)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	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:314)
	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:103)
	at cpw.mods.fml.common.Loader.serverStarting(Loader.java:740)
	... 4 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.multiplayer.WorldClient
	at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:273)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
	... 32 more
Caused by: java.lang.RuntimeException: Attempted to load class bds for invalid side SERVER
	at cpw.mods.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:50)
	at cpw.mods.fml.relauncher.RelaunchClassLoader.runTransformers(RelaunchClassLoader.java:387)
	at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:260)
	... 34 more