Server Launch Error

[bowzer12]

Title: Server Launch Error

Version: 3.1.3

OS: Windows 7 Home Premium

Java Version: 1.7.0

Description of Problem:

When launching the server, goes as per usual, then saying done which is however followed by and error message relating somewhat to Essentials I think. The problem did not occur when launching the server without Essentials, however I would like to use the plugin.

Also, when saving bPermissions, as soon as I relaunch the server, the world files reset.

Error Messages:

Error Log:

[sEVERE] Plugin Essentials is attempting to register event org/bukkit/event/player/AsyncPlayerChatEvent, which does not exist. Ignoring events registered in class com.earth2me.essentials.EssentialsPlayerListener

2012-12-27 11:29:10 [iNFO] Essentials: Using bPermissions2 based permissions.

2012-12-27 11:29:10 [iNFO] Server permissions file permissions.yml is empty, ignoring it

2012-12-27 11:29:11 [iNFO] Done (3.864s)! For help, type "help" or "?"

2012-12-27 11:29:11 [sEVERE] Exception in thread "Thread-14" 

2012-12-27 11:29:11 [sEVERE] java.lang.NoSuchMethodError: org.bukkit.scheduler.BukkitScheduler.runTaskTimerAsynchronously(Lorg/bukkit/plugin/Plugin;Ljava/lang/Runnable;JJ)Lorg/bukkit/scheduler/BukkitTask;

2012-12-27 11:29:11 [sEVERE] 	at com.earth2me.essentials.metrics.Metrics.start(Metrics.java:199)

2012-12-27 11:29:11 [sEVERE] 	at com.earth2me.essentials.metrics.MetricsStarter.run(MetricsStarter.java:192)

2012-12-27 11:29:11 [sEVERE] 	at org.bukkit.craftbukkit.scheduler.CraftWorker.run(CraftWorker.java:34)

2012-12-27 11:29:11 [sEVERE] 	at java.lang.Thread.run(Unknown Source)

2012-12-27 11:29:11 [FINE] [Railcraft] IC2 Module: IC2 Detected, creating Energy Cart and Energy Loader recipes.

2012-12-27 11:29:11 [FINEST] [Railcraft] Loaded 0 saved Anchors

2012-12-27 11:29:11 [FINE] [EE2] Loaded EE2-IC2 Addon

2012-12-27 11:29:11 [FINE] [EE2] Loaded EE2-IC2 Addon

2012-12-27 11:29:11 [FINE] [EE2] Loaded EE2-IC2 Addon

2012-12-27 11:29:11 [FINE] [EE2] Loaded EE2-IC2 Addon

2012-12-27 11:29:11 [FINE] [EE2] Loaded EE2-RP2 Core Addon

2012-12-27 11:29:11 [FINE] [EE2] Loaded EE2-RP2 Core Addon

2012-12-27 11:29:11 [FINE] [EE2] Loaded EE2-RP2 World Addon

2012-12-27 11:36:48 [iNFO] CONSOLE: Stopping the server..[m

2012-12-27 11:36:48 [iNFO] Stopping server

2012-12-27 11:36:48 [iNFO] [Essentials] Disabling Essentials v2.9.6

2012-12-27 11:36:48 [iNFO] [CCPlugin] Disabling CCPlugin v1.0

2012-12-27 11:36:48 [iNFO] [CCPlugin] CCPlugin version 1.0 disabled.

2012-12-27 11:36:48 [iNFO] [bPermissions] Disabling bPermissions v2.9.2

2012-12-27 11:36:48 [iNFO] [bPermissions] Disabled

2012-12-27 11:36:48 [iNFO] Saving chunks

[bowzer12]

Any help?