Error HeroChat

2012-02-05 20:29:09 [SEVERE] Could not pass event org.bukkit.event.player.PlayerChatEvent to Herochat
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$103.execute(JavaPluginLoader.java:1026)
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:57)
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:453)
    at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:742)
    at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:725)
    at net.minecraft.server.Packet3Chat.handle(Packet3Chat.java:33)
    at net.minecraft.server.NetworkManager.b(NetworkManager.java:226)
    at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:100)
    at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.java:78)
    at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:537)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:435)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:465)
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.bukkit.plugin.java.JavaPluginLoader$103.execute(JavaPluginLoader.java:1024)
    ... 11 more
Caused by: java.lang.NullPointerException
    at net.milkbowl.vault.chat.plugins.Chat_Permissions3.getPlayerInfoString(Chat_Permissions3.java:105)
    at net.milkbowl.vault.chat.plugins.Chat_Permissions3.getPlayerPrefix(Chat_Permissions3.java:111)
    at net.milkbowl.vault.chat.Chat.getPlayerPrefix(Chat.java:55)
    at com.dthielke.herochat.StandardChannel.applyFormat(StandardChannel.java:112)
    at com.dthielke.herochat.StandardChannel.processChat(StandardChannel.java:338)
    at com.dthielke.herochat.MessageHandler.handle(MessageHandler.java:92)
    at com.dthielke.herochat.HCPlayerListener.onPlayerChat(HCPlayerListener.java:17)
    ... 16 more