I think you need to adjust the height here so that it matches the clip.
Be aware that you have included a whole page inside your page including doctype and head tags. If you include a file into the body of a page then you should only include the relevant html and not a whole page.
It also means that you are linking to 2 css files that are almost the same so unless you adjust the correct file the changes will be overwritten.
As Ralph said that scroller is a bit of a pain to use and you can't get to the end quickly as you could with a normal scroller (or indeed with some of the better JS scrollers out there).