17:20:36 [SEVERE] Could not pass event PlayerJoinEvent to Lobby v0.2
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.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
	at net.minecraft.server.v1_6_R2.PlayerList.c(PlayerList.java:207)
	at net.minecraft.server.v1_6_R2.PlayerList.a(PlayerList.java:103)
	at net.minecraft.server.v1_6_R2.PendingConnection.e(PendingConnection.java:133)
	at net.minecraft.server.v1_6_R2.PendingConnection.d(PendingConnection.java:43)
	at net.minecraft.server.v1_6_R2.DedicatedServerConnectionThread.a(DedicatedServerConnectionThread.java:41)
	at net.minecraft.server.v1_6_R2.DedicatedServerConnection.b(SourceFile:29)
	at net.minecraft.server.v1_6_R2.MinecraftServer.t(MinecraftServer.java:590)
	at net.minecraft.server.v1_6_R2.DedicatedServer.t(DedicatedServer.java:226)
	at net.minecraft.server.v1_6_R2.MinecraftServer.s(MinecraftServer.java:486)
	at net.minecraft.server.v1_6_R2.MinecraftServer.run(MinecraftServer.java:419)
	at net.minecraft.server.v1_6_R2.ThreadServerApplication.run(SourceFile:582)
Caused by: java.lang.NoClassDefFoundError: com/mongodb/DBObject
	at im.prox.lobby.LobbyUtils.Login(LobbyUtils.java:26)
	at im.prox.lobby.LobbyListener.playerLogin(LobbyListener.java:40)
	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)
	... 14 more
Caused by: java.lang.ClassNotFoundException: com.mongodb.DBObject
	at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
	at org.bukkit.plugin.java.PluginClassLoader.findClass0(PluginClassLoader.java:80)
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:53)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
	... 21 more