SCHNELL HILFE

hey,
ich brauche schnell hilfe ich habe mir die bukkit server version 1.8.1 [1185] gedownloadet und die neuste version von essentials jetzt kommt das wenn einer in den chat schreibt oder sich einloggt.
Code:
21:10:09 [SCHWERWIEGEND] Could not pass event PLAYER_JOIN to Essentials
java.lang.NoSuchMethodError: org.bukkit.entity.Player.setPlayerListName(Ljava/la
ng/String;)V
        at com.earth2me.essentials.PlayerWrapper.setPlayerListName(PlayerWrapper
.java:750)
        at com.earth2me.essentials.User.setDisplayNick(User.java:291)
        at com.earth2me.essentials.EssentialsPlayerListener.onPlayerJoin(Essenti
alsPlayerListener.java:170)
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:244)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:58)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:338)
        at net.minecraft.server.ServerConfigurationManager.c(ServerConfiguration
Manager.java:126)
        at net.minecraft.server.NetLoginHandler.b(NetLoginHandler.java:116)
        at net.minecraft.server.NetLoginHandler.a(NetLoginHandler.java:75)
        at net.minecraft.server.Packet1Login.a(SourceFile:59)
        at net.minecraft.server.NetworkManager.b(NetworkManager.java:226)
        at net.minecraft.server.NetLoginHandler.a(NetLoginHandler.java:41)
        at net.minecraft.server.NetworkListenThread.a(SourceFile:94)
        at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:464)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:374)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:417)
21:10:09 [SCHWERWIEGEND] Could not pass event PLAYER_TELEPORT to Essentials
java.lang.NoSuchMethodError: org.bukkit.entity.Player.setPlayerListName(Ljava/la
ng/String;)V
        at com.earth2me.essentials.PlayerWrapper.setPlayerListName(PlayerWrapper
.java:750)
        at com.earth2me.essentials.User.setDisplayNick(User.java:291)
        at com.earth2me.essentials.EssentialsPlayerListener.onPlayerTeleport(Ess
entialsPlayerListener.java:259)
        at org.bukkit.plugin.java.JavaPluginLoader$9.execute(JavaPluginLoader.ja
va:300)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:58)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:338)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:386)
        at net.minecraft.server.NetLoginHandler.b(NetLoginHandler.java:117)
        at net.minecraft.server.NetLoginHandler.a(NetLoginHandler.java:75)
        at net.minecraft.server.Packet1Login.a(SourceFile:59)
        at net.minecraft.server.NetworkManager.b(NetworkManager.java:226)
        at net.minecraft.server.NetLoginHandler.a(NetLoginHandler.java:41)
        at net.minecraft.server.NetworkListenThread.a(SourceFile:94)
        at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:464)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:374)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:417)
ich brauche schnell hilfe