Error #2

2013-01-31 15:13:04 [INFO] [Minecraft] Disconnecting Jinx251 [/127.0.0.1:63417]: Internal server error
2013-01-31 15:13:04 [SEVERE] [ForgeModLoader] Error handling login related packet - connection from Jinx251 [/127.0.0.1:63417] refused
java.lang.NullPointerException
        at gm.a(ServerConfigurationManager.java:114)
        at it.completeConnection(NetLoginHandler.java:198)
        at cpw.mods.fml.common.network.FMLNetworkHandler.handleClientConnection(FMLNetworkHandler.java:153)
        at cpw.mods.fml.common.network.FMLNetworkHandler.onConnectionReceivedFromClient(FMLNetworkHandler.java:107)
        at it.d(NetLoginHandler.java:182)
        at it.c(NetLoginHandler.java:75)
        at hu.a(ServerListenThread.java:56)
        at ht.b(SourceFile:29)
        at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:703)
        at ho.r(DedicatedServer.java:269)
        at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:599)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:497)
        at fy.run(SourceFile:849)
2013-01-31 15:13:04 [WARNING] [Minecraft] Failed to handle packet for Jinx251 [/127.0.0.1:63417]: java.lang.NullPointerException
java.lang.NullPointerException
        at gm.a(ServerConfigurationManager.java:114)
        at it.completeConnection(NetLoginHandler.java:198)
        at cpw.mods.fml.common.network.FMLNetworkHandler.handleClientConnection(FMLNetworkHandler.java:153)
        at cpw.mods.fml.common.network.FMLNetworkHandler.onConnectionReceivedFromClient(FMLNetworkHandler.java:107)
        at it.d(NetLoginHandler.java:182)
        at it.c(NetLoginHandler.java:75)
        at hu.a(ServerListenThread.java:56)
        at ht.b(SourceFile:29)
        at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:703)
        at ho.r(DedicatedServer.java:269)
        at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:599)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:497)
        at fy.run(SourceFile:849)