Simple Custom Scrollbar tutorial question

[X] RESOLVED

I am using the “Simple Custom Scrollbar” by kirupa.

I am having a problem with the content displaying. Lets say I have the content block (contentMain) that is 3434px high, filled with content. The information displays only up to a little bit over half way through the content and then it just cuts off, the scroller still scrolls all of the way but the content stops displaying after a certain point… :h:

Any help will be appreciated!

Thank You.