ClassNotFoundException

When I try to run Bukkit with my plugin, it gives me this:

Code:

        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.j
ava:82)
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.
java:115)
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager
.java:80)
        at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:37)
        at net.minecraft.server.MinecraftServer.e(MinecraftServer.java:153)
        at net.minecraft.server.MinecraftServer.c(MinecraftServer.java:140)
        at net.minecraft.server.MinecraftServer.d(MinecraftServer.java:104)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:177)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:512)
Caused by: java.lang.ClassNotFoundException: com.bukkit.RightLegRed.Civilization
s
        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:31)
        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:76)
        ... 8 more

My plugin.yml:

Code:

name: Civilizations

main: com.bukkit.RightLegRed.Civilizations

version: 1.0.0.0

 

You just put the package name in there, though the line should refer to your main class.
Just add another .Civilizations (main class name) and it should be ok.