Nei Crashing when I try an look at the items

[redbanana22]

I am having this problem here is my nei error I don't know what to do

code]NEI Version: 1.4.5.1

java.lang.ClassCastException: bu cannot be cast to bq

at codechicken.nei.NEIClientConfig.loadWorld(NEIClientConfig.java:315)

at codechicken.nei.ClientPacketHandler.handleSMPCheck(ClientPacketHandler.java:123)

at codechicken.nei.ClientPacketHandler.handlePacket(ClientPacketHandler.java:26)

at codechicken.core.PacketCustom$ClientPacketHander.handle(PacketCustom.java:90)

at codechicken.core.PacketCustom$CustomPacketHandler.onPacketData(PacketCustom.java:59)

at cpw.mods.fml.common.network.NetworkRegistry.handlePacket(NetworkRegistry.java:243)

at cpw.mods.fml.common.network.NetworkRegistry.handleCustomPacket(NetworkRegistry.java:233)

at cpw.mods.fml.common.network.FMLNetworkHandler.handlePacket250Packet(FMLNetworkHandler.java:71)

at ayh.a(NetClientHandler.java:1483)

at di.a(SourceFile:59)

at cg.b(TcpConnection.java:458)

at ayh.d(NetClientHandler.java:240)

at ayk.c(GuiConnecting.java:49)

at net.minecraft.client.Minecraft.l(Minecraft.java:1537)

at net.minecraft.client.Minecraft.J(Minecraft.java:846)

at net.minecraft.client.Minecraft.run(Minecraft.java:771)

at java.lang.Thread.run(Unknown Source)