[SEVERE] Could not load 'plugins\ItemRenamer.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.ClassNotFoundException: org.shininet.bukkit.itemrenamer.ItemRenamer
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:184)
	at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:305)
	at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:230)
	at org.bukkit.craftbukkit.v1_4_5.CraftServer.loadPlugins(CraftServer.java:264)
	at org.bukkit.craftbukkit.v1_4_5.CraftServer.<init>(CraftServer.java:242)
	at net.minecraft.server.v1_4_5.ServerConfigurationManagerAbstract.<init>(ServerConfigurationManagerAbstract.java:52)
	at net.minecraft.server.v1_4_5.ServerConfigurationManager.<init>(SourceFile:11)
	at net.minecraft.server.v1_4_5.DedicatedServer.init(DedicatedServer.java:111)
	at net.minecraft.server.v1_4_5.MinecraftServer.run(MinecraftServer.java:403)
	at net.minecraft.server.v1_4_5.ThreadServerApplication.run(SourceFile:856)
Caused by: java.lang.ClassNotFoundException: org.shininet.bukkit.itemrenamer.ItemRenamer
	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.java:173)