Friends Get "Internal Server Error" when trying to connect.

[bioa10]

Title: Friends Get "Internal Server Error" when trying to connect.

Version: 1_0_3

OS: Windows 8

Java Version: Java 7 Update 25

Description of Problem:

So me and my friend were exploring dimensional doors and when I walked through a door I crashed. Now when my friend tries to connect they get "Internal Server Error" I put the error log my lan server gave me.

Error Messages:

Error Log:

2013-11-11 10:03:19 [sERVER] [iNFO] Disconnecting murmis12 [/192.168.1.1:54958]: Internal server error

2013-11-11 10:03:19 [sERVER] [WARNING] Failed to handle packet for murmis12 [/192.168.1.1:54958]: java.lang.NullPointerException

java.lang.NullPointerException

	at StevenDimDoors.mod_pocketDim.PacketHandler.onClientJoinPacket(PacketHandler.java:180)

	at StevenDimDoors.mod_pocketDim.ConnectionHandler.connectionReceived(ConnectionHandler.java:30)

	at cpw.mods.fml.common.network.NetworkRegistry.connectionReceived(NetworkRegistry.java:181)

	at cpw.mods.fml.common.network.FMLNetworkHandler.handleClientConnection(FMLNetworkHandler.java:146)

	at cpw.mods.fml.common.network.FMLNetworkHandler.onConnectionReceivedFromClient(FMLNetworkHandler.java:120)

	at net.minecraft.network.NetLoginHandler.func_72529_d(NetLoginHandler.java:178)

	at net.minecraft.network.NetLoginHandler.func_72532_c(NetLoginHandler.java:71)

	at net.minecraft.server.ServerListenThread.func_71766_a(ServerListenThread.java:55)

	at net.minecraft.server.integrated.IntegratedServerListenThread.func_71747_b(IntegratedServerListenThread.java:108)

	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:677)

	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:573)

	at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:127)

	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:470)

	at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)