Quote from TheBlueRocky
I put the jar into my Bukkit 1.4.5's plugin folder, closed the server, re-ran it, and each time I have done so, the console gives me an error and doesn't load properly.
Any idea what I did wrong? :\
You didn't do anything wrong. This error is because you're (probably) on Java 6,
I recommend you update to Java 7.
Cool plugin, anyway!