Solved [Help] Plugin Error!!! How can I fix???

Hello:
I finally createt my one Plugin BUT there is an Error:

[INFO] [ServerMemberInfo] Enabling ServerMemberInfo v0.2
2013-08-05 17:43:51 [INFO] [ServerMemberInfo]: I am starting!
2013-08-05 17:43:51 [SEVERE] Error occurred while enabling ServerMemberInfo v0.2 (Is it up to date?)
java.lang.NullPointerException
at de.minecraftair.ServerMemberInfo.ServerMemberInfo.onEnable(ServerMemberInfo.java:24)
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:217)
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:457)
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:381)
at org.bukkit.craftbukkit.v1_6_R2.CraftServer.loadPlugin(CraftServer.java:282)
at org.bukkit.craftbukkit.v1_6_R2.CraftServer.enablePlugins(CraftServer.java:264)
at net.minecraft.server.v1_6_R2.MinecraftServer.l(MinecraftServer.java:313)
at net.minecraft.server.v1_6_R2.MinecraftServer.f(MinecraftServer.java:290)
at net.minecraft.server.v1_6_R2.MinecraftServer.a(MinecraftServer.java:250)
at net.minecraft.server.v1_6_R2.DedicatedServer.init(DedicatedServer.java:151)
at net.minecraft.server.v1_6_R2.MinecraftServer.run(MinecraftServer.java:391)
at net.minecraft.server.v1_6_R2.ThreadServerApplication.run(SourceFile:582)

Does anyone know how to solve it???
Yours GamerWorld!!!

Problem solved

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Post the source code of the plugin's main class, please

 

The Problem was solved!