2013-01-30 09:21:09 [SEVERE] Could not load 'plugins\ModifyMessages.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.IllegalArgumentException: File cannot be null
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:182)
	at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:305)
	at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:230)
	at org.bukkit.craftbukkit.v1_4_R1.CraftServer.loadPlugins(CraftServer.java:239)
	at org.bukkit.craftbukkit.v1_4_R1.CraftServer.<init>(CraftServer.java:217)
	at net.minecraft.server.v1_4_R1.PlayerList.<init>(PlayerList.java:52)
	at net.minecraft.server.v1_4_R1.DedicatedPlayerList.<init>(SourceFile:11)
	at net.minecraft.server.v1_4_R1.DedicatedServer.init(DedicatedServer.java:104)
	at net.minecraft.server.v1_4_R1.MinecraftServer.run(MinecraftServer.java:399)
	at net.minecraft.server.v1_4_R1.ThreadServerApplication.run(SourceFile:849)
Caused by: java.lang.IllegalArgumentException: File cannot be null
	at org.apache.commons.lang.Validate.notNull(Validate.java:203)
	at org.bukkit.configuration.file.YamlConfiguration.loadConfiguration(YamlConfiguration.java:170)
	at org.bukkit.plugin.java.JavaPlugin.reloadConfig(JavaPlugin.java:117)
	at org.bukkit.plugin.java.JavaPlugin.getConfig(JavaPlugin.java:111)
	at me.Grimlock257.ModifyMessages.ModifyMessagesMain.<init>(ModifyMessagesMain.java:39)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
	at java.lang.reflect.Constructor.newInstance(Unknown Source)
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:178)
	... 9 more