I downloaded World of Minecraft Client, and I'm pretty sure I have all the necessary files, all extracted. I have Windows XP and the latest version of Java. But when I click on "World of Minecraft.exe" all I hear is the sound you get when there's some sort of error. No window pops up, I don't see anything. I just hear that noise (I can't think of how to describe it... just a single note, sort of low, you hear it when a popup shows up with the big red X on it?)

What could be wrong?