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java.lang.NullPointerException: 	at com.dthielke.herochat.HCPlayerListener.onPlayerChangeWorld(HCPlayerListener.java:64)	at sun.reflect.GeneratedMethodAccessor587.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:334)	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:507)	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:492)	at cpw.mods.fml.common.FMLCommonHandler.firePlayerChangedDimensionEvent(FMLCommonHandler.java:564)	at net.minecraft.server.management.ServerConfigurationManager.respawnPlayer(ServerConfigurationManager.java:812)	at org.bukkit.craftbukkit.v1_7_R4.entity.CraftPlayer.teleport(CraftPlayer.java:507)	at org.bukkit.craftbukkit.v1_7_R4.entity.CraftEntity.teleport(CraftEntity.java:410)	at fr.xephi.authme.listener.AuthMePlayerListener.onPlayerJoin(AuthMePlayerListener.java:659)	at sun.reflect.GeneratedMethodAccessor478.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:334)	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:507)	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:492)	at net.minecraft.server.management.ServerConfigurationManager.func_72377_c(ServerConfigurationManager.java:361)	at net.minecraft.server.management.ServerConfigurationManager.initializeConnectionToPlayer(ServerConfigurationManager.java:217)	at cpw.mods.fml.common.network.handshake.NetworkDispatcher.completeServerSideConnection(NetworkDispatcher.java:190)	at cpw.mods.fml.common.network.handshake.NetworkDispatcher.completeHandshake(NetworkDispatcher.java:465)	at cpw.mods.fml.common.network.internal.HandshakeCompletionHandler.channelRead0(HandshakeCompletionHandler.java:21)	at cpw.mods.fml.common.network.internal.HandshakeCompletionHandler.channelRead0(HandshakeCompletionHandler.java:11)	at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:98)	at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337)	at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323)	at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)	at io.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:111)	at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337)	at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323)	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:785)	at io.netty.channel.embedded.EmbeddedChannel.writeInbound(EmbeddedChannel.java:169)	at cpw.mods.fml.common.network.internal.FMLProxyPacket.func_148833_a(FMLProxyPacket.java:77)	at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:245)	at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:173)	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:991)	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:431)	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:809)	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:669)	at java.lang.Thread.run(Unknown Source)