RotaryCraft server crash

---- Minecraft Crash Report ----

Time: 12/09/14 12:15
Description: Exception in server tick loop

java.lang.NoSuchMethodError: Reika.DragonAPI.Libraries.IO.ReikaChatHelper.clearChat()V
	at Reika.RotaryCraft.Items.Tools.ItemMeter.func_77648_a(ItemMeter.java:84)
	at net.minecraft.item.ItemStack.func_77943_a(ItemStack.java:127)
	at net.minecraft.server.management.ItemInWorldManager.func_73078_a(ItemInWorldManager.java:389)
	at net.minecraft.network.NetHandlerPlayServer.func_147346_a(NetHandlerPlayServer.java:554)
	at net.minecraft.network.play.client.C08PacketPlayerBlockPlacement.func_148833_a(SourceFile:60)
	at net.minecraft.network.play.client.C08PacketPlayerBlockPlacement.func_148833_a(SourceFile:9)
	at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212)
	at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:165)
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:659)
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:335)
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427)
	at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)