17:40:26 [SEVERE] Could not load 'plugins\ExtremeHardcore-0.5.2.jar' in folder '
plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.ClassNotFoundException: com.
mrkirby153.ExtremeHardcore.main
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.j
ava:184)
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.
java:305)
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager
.java:230)
        at org.bukkit.craftbukkit.v1_5_R2.CraftServer.loadPlugins(CraftServer.ja
va:239)
        at org.bukkit.craftbukkit.v1_5_R2.CraftServer.<init>(CraftServer.java:21
7)
        at net.minecraft.server.v1_5_R2.PlayerList.<init>(PlayerList.java:55)
        at net.minecraft.server.v1_5_R2.DedicatedPlayerList.<init>(SourceFile:11
)
        at net.minecraft.server.v1_5_R2.DedicatedServer.init(DedicatedServer.jav
a:105)
        at net.minecraft.server.v1_5_R2.MinecraftServer.run(MinecraftServer.java
:381)
        at net.minecraft.server.v1_5_R2.ThreadServerApplication.run(SourceFile:5
73)
Caused by: java.lang.ClassNotFoundException: com.mrkirby153.ExtremeHardcore.main

        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        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(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Unknown Source)
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.j
ava:173)
        ... 9 more