MeloniZeR

When I click the right button, i/t throws me out of the server it happens only when I have in my equipment : thunder staff , nature staff , etc at net.minecraft.entity.player.EntityPlayerMP.func_71127_g(EntityPlayerMP.java:349) ~w.class:?] at net.minecraft.network.NetHandlerPlayServer.func_147347_a(NetHandlerPlayServer.java:303) ~[nh.class:?] at net.minecraft.network.play.client.C03PacketPlayer.func_148833_a(SourceFile:137) ~[jd.class:?] at net.minecraft.network.play.client.C03PacketPlayer.func_148833_a(SourceFile:8) ~[jd.class:?] at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212) ~[ej.class:?] at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:165) [nc.class:?] at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:659) [MinecraftServer.class:?] at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:334) [lt.class:?] at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547) [MinecraftServer.class:?] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427) [MinecraftServer.class:?] at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685) [li.class:?] Caused by: java.lang.NoSuchMethodError: net.minecraft.entity.player.EntityPlayer.func_71011_bu()Lnet/minecraft/item/ItemStack; at com.chocolate.chocolateQuest.items.ItemStaffBase.func_77663_a(ItemStaffBase.java:127) ~[ItemStaffBase.class:?] at net.minecraft.item.ItemStack.func_77945_a(ItemStack.java:381) ~[add.class:?] at net.minecraft.entity.player.InventoryPlayer.func_70429_k(InventoryPlayer.java:311) ~[yx.class:?] at net.minecraft.entity.player.EntityPlayer.func_70636_d(EntityPlayer.java:538) ~[yz.class:?] at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:1611) ~[sv.class:?] at net.minecraft.entity.player.EntityPlayer.func_70071_h_(EntityPlayer.java:288) ~[yz.class:?] at net.minecraft.entity.player.EntityPlayerMP.func_71127_g(EntityPlayerMP.java:295) ~w.class:?] ... 10 more Help me guys