[INFO] Starting minecraft server version 1.4.7
[SEVERE] Encountered an unexpected exception LoaderException
cpw.mods.fml.common.LoaderException: java.lang.NoClassDefFoundError: ays
	at cpw.mods.fml.common.LoadController.transition(LoadController.java:130)
	at cpw.mods.fml.common.Loader.loadMods(Loader.java:506)
	at cpw.mods.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:86)
	at cpw.mods.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:351)
	at ho.c(DedicatedServer.java:64)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:458)
	at fy.run(SourceFile:849)
Caused by: java.lang.NoClassDefFoundError: ays
	at invtweaks.forge.InvTweaksMod.preInit(InvTweaksMod.java:41)
	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 cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:487)
	at sun.reflect.GeneratedMethodAccessor3.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:153)
	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:86)
	at cpw.mods.fml.common.Loader.loadMods(Loader.java:505)
	... 5 more
Caused by: java.lang.ClassNotFoundException: ays
	at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:185)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	... 31 more
Caused by: java.lang.NullPointerException
	at org.objectweb.asm.ClassReader.<init>(Unknown Source)
	at codechicken.core.asm.ClassHeirachyManager.transform(ClassHeirachyManager.java:80)
	at cpw.mods.fml.relauncher.RelaunchClassLoader.runTransformers(RelaunchClassLoader.java:228)
	at cpw.mods.fml.relauncher.RelaunchClassLoader.findClass(RelaunchClassLoader.java:173)
	... 33 more
[SEVERE] This crash report has been saved to: C:\Users\Anwender\Desktop\Minecraft\Feed the Beast\Server\FTBLite_Server\.\crash-reports\crash-2013-06-19_16.17.35-server.txt