DivSmoothScroll not scrolling at all

Okay, here's my problem: I had DivSmoothScroll running just fine, then I moved the div开发者_StackOverflow中文版 further down in the source and it suddenly stopped working.

I would also accept better alternatives to implement that behavior.

The URL: http://cassel-classic-cars.de/n/

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I checked the site using chrome and found this error: Uncaught TypeError: Cannot set property 'printId' of undefined. It seems to be a problem with the lytebox.js. I suggest to get rid of this error first.