2013-07-10 20:32:53 [SEVERE] Could not pass event RegenBlockEventRespawn to RegenBlock vBeta 5.7
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:427)
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
    at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:30)
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:478)
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:463)
    at net.dmg2.RegenBlock.RegenBlockQueue.checkQueue(RegenBlockQueue.java:178)
    at net.dmg2.RegenBlock.RegenBlockQueue.run(RegenBlockQueue.java:38)
    at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.IllegalStateException: Asynchronous entity world add!
    at net.minecraft.server.v1_6_R1.World.a(World.java:2481)
    at net.minecraft.server.v1_6_R1.Chunk.addEntities(Chunk.java:683)
    at net.minecraft.server.v1_6_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:128)
    at net.minecraft.server.v1_6_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:84)
    at org.bukkit.craftbukkit.v1_6_R1.CraftWorld.getChunkAt(CraftWorld.java:119)
    at org.bukkit.craftbukkit.v1_6_R1.CraftWorld.getBlockAt(CraftWorld.java:83)
    at org.bukkit.craftbukkit.v1_6_R1.CraftWorld.getBlockAt(CraftWorld.java:485)
    at net.dmg2.RegenBlock.Listener.RegenBlockEventListenerBlock.onEvent(RegenBlockEventListenerBlock.java:111)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425)
    ... 7 more