2.5.4 error

2011-03-20 00:16:51 [SEVERE] Could not load plugins\Permissions.jar in plugins: null
org.bukkit.plugin.InvalidPluginException
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:113)
	at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:159)
	at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:107)
	at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:61)
	at net.minecraft.server.MinecraftServer.e(MinecraftServer.java:204)
	at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:191)
	at net.minecraft.server.MinecraftServer.d(MinecraftServer.java:131)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:246)
	at net.minecraft.server.ThreadServerApplication.run(SourceFile:366)
Caused by: java.lang.reflect.InvocationTargetException
	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:109)
	... 8 more
Caused by: java.lang.NullPointerException
	at com.nijikokun.bukkit.Permissions.Permissions.<init>(Permissions.java:77)
	... 13 more