Bukkit

What steps will reproduce the problem?
1.starting the server .. simple as that :P
2. --
3. --

What is the expected output? What do you see instead?
It is suppose to start i think ;) .. a long message saying that i've got a unsuported major minor version 51.0

What version of the product are you using?
Mcportcentral build latest one with bukkit 1.2.5-R4.0
and your latest build of the plugin .. version 1.5.2.1 for bukkit 1.2.5-R4.0

Do you have an error log of what happened?

2012-06-15 17:56:06 [SEVERE] Could not load 'plugins\ColorKeys.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: musaddict/colorkeys/ColorKeys : Unsupported major.minor version 51.0
    at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:151)
    at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:310)
    at forge.bukkit.ForgePluginManager.loadPlugin(ForgePluginManager.java:55)
    at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:231)
    at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:219)
    at org.bukkit.craftbukkit.CraftServer.<init>(CraftServer.java:195)
    at net.minecraft.server.ServerConfigurationManager.<init>(ServerConfigurationManager.java:53)
    at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:174)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:441)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
Caused by: java.lang.UnsupportedClassVersionError: musaddict/colorkeys/ColorKeys : Unsupported major.minor version 51.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(Unknown Source)
    at java.lang.ClassLoader.defineClass(Unknown Source)
    at java.security.SecureClassLoader.defineClass(Unknown Source)
    at java.net.URLClassLoader.defineClass(Unknown Source)
    at java.net.URLClassLoader.access$000(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.findClass(PluginClassLoader.java:41)
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:29)
    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:140)
    ... 9 more

I hope you have a solution for this because this is like my favorite plugin ever ! :) .. have a great day/night :D
Cilicou ;P

Changed the name and marked it as accepted so others can find it and so it remains sorta open. (Don't be confused though, this is not a bug and there's nothing to fix (plugin-wise))

This is not a problem with CK.

CK requires (at a minimum) Java version 1.7 (CK has been this was since version 1.2.0 (or maybe 1.3.0) IIRC)
Unsupported major.minor version 51.0 (google it, seriously) means that you are using 1.6 or below. Update to Java 1.7 and the error will go away.

This is not an issue with either this plugin or CB.

(If you do have 1.7 installed make sure your run.bat for starting the server points to the correct java.exe)

@FeedDante: Go

Omg now that you're telling me that I feel like a noob -.- ! XD But then thanks alot ! I really appreciate your work :)