[17:22:26 ERROR]: Could not load 'plugins\EntityControl.jar' in folder 'plugins'

org.bukkit.plugin.InvalidPluginException: java.lang.IllegalStateException: JavaP
lugin requires org.bukkit.plugin.java.PluginClassLoader
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.j
ava:149) ~[JavaPluginLoader.class:?]
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.
java:334) ~[SimplePluginManager.class:?]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager
.java:256) [SimplePluginManager.class:?]
        at org.bukkit.craftbukkit.v1_7_R4.CraftServer.loadPlugins(CraftServer.ja
va:320) [CraftServer.class:?]
        at net.minecraft.world.storage.SaveHandler.initBukkitData(SaveHandler.ja
va:458) [ayq.class:?]
        at net.minecraft.world.storage.SaveHandler.func_75757_d(SaveHandler.java
:136) [ayq.class:?]
        at net.minecraft.world.World.<init>(World.java:350) [ahb.class:?]
        at net.minecraft.world.WorldServer.<init>(WorldServer.java:153) [mt.clas
s:?]
        at net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.jav
a:356) [MinecraftServer.class:?]
        at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(Dedicated
Server.java:329) [lt.class:?]
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:620) [M
inecraftServer.class:?]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_11]
Caused by: java.lang.IllegalStateException: JavaPlugin requires org.bukkit.plugi
n.java.PluginClassLoader
        at org.bukkit.plugin.java.JavaPlugin.<init>(JavaPlugin.java:64) ~[JavaPl
ugin.class:?]
        at io.hotmail.com.jacob_vejvoda.EntityControl.EntityControl.<init>(Entit
yControl.java:27) ~[EntityControl.class:?]
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
 ~[?:1.8.0_11]
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
 ~[?:1.8.0_11]
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Sou
rce) ~[?:1.8.0_11]
        at java.lang.reflect.Constructor.newInstance(Unknown Source) ~[?:1.8.0_1
1]
        at java.lang.Class.newInstance(Unknown Source) ~[?:1.8.0_11]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.jav
a:201) ~[PluginClassLoader.class:?]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.j
ava:145) ~[JavaPluginLoader.class:?]
        ... 11 more