Description: Exception in server tick loop

java.lang.IncompatibleClassChangeError: Expecting non-static method net.mcdecimation.mod.handler.EntityDeathEvent.onLivingDeath(Lnet/minecraftforge/event/entity/living/LivingDeathEvent;)V
	at cpw.mods.fml.common.eventhandler.ASMEventHandler_30_EntityDeathEvent_onLivingDeath_LivingDeathEvent.invoke(.dynamic)
	at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54)
	at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:140)
	at net.minecraftforge.common.ForgeHooks.onLivingDeath(ForgeHooks.java:305)
	at net.minecraft.entity.player.EntityPlayerMP.onDeath(EntityPlayerMP.java:443)
	at net.minecraft.entity.EntityLivingBase.attackEntityFrom(EntityLivingBase.java:940)
	at net.minecraft.entity.player.EntityPlayer.attackEntityFrom(EntityPlayer.java:1161)
	at net.minecraft.entity.player.EntityPlayerMP.attackEntityFrom(EntityPlayerMP.java:532)
	at net.minecraft.entity.player.EntityPlayer.attackTargetEntityWithCurrentItem(EntityPlayer.java:1389)
	at net.minecraft.network.NetHandlerPlayServer.processUseEntity(NetHandlerPlayServer.java:874)
	at net.minecraft.network.play.client.C02PacketUseEntity.processPacket(C02PacketUseEntity.java:51)
	at net.minecraft.network.play.client.C02PacketUseEntity.processPacket(C02PacketUseEntity.java:69)
	at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:241)
	at net.minecraft.network.NetworkSystem.networkTick(NetworkSystem.java:182)
	at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:730)
	at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:618)
	at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:118)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:489)
	at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:756)