Could not load plugins

I'm getting the following error from a super simple plugin I made:

Code:

07-Feb-2011 22:25:13 org.bukkit.plugin.SimplePluginManager loadPlugins
SEVERE: Could not load plugins\iLDR.jar in plugins: null
org.bukkit.plugin.InvalidPluginException
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.j
ava:78)
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.
java:117)
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager
.java:82)
        at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:42)
        at net.minecraft.server.MinecraftServer.e(MinecraftServer.java:156)
        at net.minecraft.server.MinecraftServer.c(MinecraftServer.java:143)
        at net.minecraft.server.MinecraftServer.d(MinecraftServer.java:104)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:186)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:512)
Caused by: java.lang.ClassNotFoundException: com.bukkit.perry.iLDR
        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.findClass(PluginClassLoader.
java:30)
        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:72)
        ... 8 more

Based it off this tutorial vid (http://www.youtube.com/watch?v=qgpWMFKu9R0&feature=player_embedded).
I'm not sure what's going wrong but I tried to compiling the source from the vid and that gave the same error too.
I will post source if needed but it's basically this (<Edit by Moderator: Redacted mediafire url>

Sorry I can't explain the error further but I just have no idea what it is.

Built with Eclipse on Windows 7, latest version of bukkit.
Ran on Windows Server 2008 R2.

Thanks

 

most likely same problem as here:
http://forums.bukkit.org/threads/invalidpluginexception.3658/

 

Yeah just saw that a second after I posted.
No error thrown now but it doesn't show the message in the console to say its loaded nor does it work in game.
I'll investigate