MooTools More Keyboard refreshes page?

I'm playing around with MooTools, including MooTools More.

I currently have a blank HTML page with a reference to both the core and the more js files. However, when I use var kb = K开发者_StackOverflow社区eyboard(), the page gets refreshed. I guess this is not what it is supposed to do.

What is the use of this, or what am I possibly doing wrong?

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instantiate it with var kb = new Keyboard();