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If anyone can look at this and tell me the possibility of whats wrong that would be great.

2013-12-08 15:19:08 [SEVERE] The server has stopped responding!
2013-12-08 15:19:08 [SEVERE] Please report this to http://mcportcentral.co.za/
2013-12-08 15:19:08 [SEVERE] Be sure to include ALL relevant console errors and Minecraft crash reports
2013-12-08 15:19:08 [SEVERE] MCPC+ version: git-MCPC-Plus-jenkins-MCPC-Plus-160 (MC: 1.6.4)
2013-12-08 15:19:08 [SEVERE] ------------------------------
2013-12-08 15:19:08 [SEVERE] Server thread dump (Look for plugins here before reporting to MCPC+!):
2013-12-08 15:19:14 [INFO] Connection reset
2013-12-08 15:19:15 [SEVERE] ------------------------------
2013-12-08 15:19:15 [SEVERE] Current Thread: Server thread
2013-12-08 15:19:15 [SEVERE] PID: 15 | Suspended: false | Native: false | State: RUNNABLE
2013-12-08 15:19:15 [SEVERE] Stack:
2013-12-08 15:19:15 [SEVERE] java.util.HashMap.getEntry(HashMap.java:367)
2013-12-08 15:19:15 [SEVERE] java.util.HashMap$EntrySet.contains(HashMap.java:1002)
2013-12-08 15:19:15 [SEVERE] java.util.AbstractCollection.containsAll(AbstractCollection.java:308)
2013-12-08 15:19:15 [SEVERE] java.util.AbstractSet.equals(AbstractSet.java:95)
2013-12-08 15:19:15 [SEVERE] net.minecraft.nbt.NBTTagCompound.equals(NBTTagCompound.java:441)
2013-12-08 15:19:15 [SEVERE] java.util.HashMap$Entry.equals(HashMap.java:759)
2013-12-08 15:19:15 [SEVERE] java.util.HashMap$EntrySet.contains(HashMap.java:1003)
2013-12-08 15:19:15 [SEVERE] java.util.AbstractCollection.containsAll(AbstractCollection.java:308)
2013-12-08 15:19:15 [SEVERE] java.util.AbstractSet.equals(AbstractSet.java:95)
2013-12-08 15:19:15 [SEVERE] net.minecraft.nbt.NBTTagCompound.equals(NBTTagCompound.java:441)
2013-12-08 15:19:15 [SEVERE] net.minecraft.item.ItemStack.func_77959_d(ItemStack.java:488)
2013-12-08 15:19:15 [SEVERE] net.minecraft.item.ItemStack.func_77989_b(ItemStack.java:480)
2013-12-08 15:19:15 [SEVERE] net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:1961)
2013-12-08 15:19:15 [SEVERE] net.minecraft.entity.player.EntityPlayer.func_70071_h_(EntityPlayer.java:370)
2013-12-08 15:19:15 [SEVERE] net.minecraft.entity.player.EntityPlayerMP.func_71127_g(EntityPlayerMP.java:424)
2013-12-08 15:19:15 [SEVERE] net.minecraft.network.NetServerHandler.func_72498_a(NetServerHandler.java:509)
2013-12-08 15:19:15 [SEVERE] net.minecraft.network.packet.Packet10Flying.func_73279_a(Packet10Flying.java:51)
2013-12-08 15:19:15 [SEVERE] net.minecraft.network.TcpConnection.func_74428_b(TcpConnection.java:470)
2013-12-08 15:19:15 [SEVERE] net.minecraft.network.NetServerHandler.func_72570_d(NetServerHandler.java:233)
2013-12-08 15:19:15 [SEVERE] net.minecraft.network.NetworkListenThread.func_71747_b(NetworkListenThread.java:54)
2013-12-08 15:19:15 [SEVERE] net.minecraft.server.dedicated.DedicatedServerListenThread.func_71747_b(DedicatedServerListenThread.java:34)
2013-12-08 15:19:15 [SEVERE] net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:913)
2013-12-08 15:19:15 [SEVERE] net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:330)
2013-12-08 15:19:15 [SEVERE] net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:780)
2013-12-08 15:19:15 [SEVERE] net.minecraft.server.MinecraftServer.run(MinecraftServer.java:662)
2013-12-08 15:19:15 [SEVERE] net.minecraft.server.ThreadMinecraftServer.run(ThreadMinecraftServer.java:16)
2013-12-08 15:19:15 [SEVERE] ------------------------------