Problem with the custom scroll bar

I have a problem in jquery in custom scroll bar. Here is the [source][1]

There is a custom scroll bar. It almost working fine, but the problem is, it doesn't go down to the last level. It just stops to a half way scroll.

Thanx in advance开发者_如何转开发.

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Might have something to do with jQuery not being loaded

http://www.b52boutique.com/skin/frontend/base/default/js/jquery.js 404 (Not Found)