mustbeaginger

hey guys i just installed crafting table 3 mod it works on client single player the items shows in nei the crafting table 3 comes up but when i click to spawn on it says internal server error ?

Title: java.lang.nullpointerexcption Version: 2.1.1 OS: windows Java Version: idk Description of Problem: i installed crafting table 3 mod Error Messages: 18:07:33 [WARNING] Failed to handle packet: java.lang.NullPointerException java.lang.NullPointerException at net.minecraft.server.ItemStack.setData(ItemStack.java:153) at net.minecraft.server.ItemStack.<init>(ItemStack.java:39) at codechicken.core.PacketCustom.readItemStack(PacketCustom.java:409 at codechicken.nei.NEIServerPacketHandler.handleGiveItem(NEIServerPa Handler.java:116) at codechicken.nei.NEIServerPacketHandler.handlePacket(NEIServerPack ndler.java:21) at codechicken.core.CoreUtils.handlePacket(CoreUtils.java:150) at codechicken.core.PacketCustom.recieve(PacketCustom.java:451) at net.minecraft.server.mod_CodeChickenCore.onPacket250Received(mod_ ChickenCore.java:65) at net.minecraft.server.BaseMod.onPacket250Packet(BaseMod.java:93) at cpw.mods.fml.server.FMLBukkitHandler.handlePacket250(FMLBukkitHan .java:407) at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:133 at net.minecraft.server.Packet250CustomPayload.handle(SourceFile:46) at net.minecraft.server.NetworkManager.b(NetworkManager.java:234) at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:119 at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.ja 3) at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:579) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:467 at net.minecraft.server.ThreadServerApplication.run(SourceFile:492) Error Log: 18:07:33 [WARNING] Failed to handle packet: java.lang.NullPointerException java.lang.NullPointerException at net.minecraft.server.ItemStack.setData(ItemStack.java:153) at net.minecraft.server.ItemStack.<init>(ItemStack.java:39) at codechicken.core.PacketCustom.readItemStack(PacketCustom.java:409 at codechicken.nei.NEIServerPacketHandler.handleGiveItem(NEIServerPa Handler.java:116) at codechicken.nei.NEIServerPacketHandler.handlePacket(NEIServerPack ndler.java:21) at codechicken.core.CoreUtils.handlePacket(CoreUtils.java:150) at codechicken.core.PacketCustom.recieve(PacketCustom.java:451) at net.minecraft.server.mod_CodeChickenCore.onPacket250Received(mod_ ChickenCore.java:65) at net.minecraft.server.BaseMod.onPacket250Packet(BaseMod.java:93) at cpw.mods.fml.server.FMLBukkitHandler.handlePacket250(FMLBukkitHan .java:407) at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:133 at net.minecraft.server.Packet250CustomPayload.handle(SourceFile:46) at net.minecraft.server.NetworkManager.b(NetworkManager.java:234) at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:119 at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.ja 3) at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:579) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:467 at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)