Problem in Kirupa's Contet Scroll

[URL=“http://www.kirupa.com/forum/showthread.php?t=206127&highlight=Content+Scrollbar”]

Here i am Using Kirupas’ Content Scroll Code.

All Are working is Fine . My Content Hight was -3345.0 .

(contentMain) Contain all of my websites and A small Description about the sites. When i Press the btnUp From Intial Stage . All Contents goes to Down. This is my problem . When i Tried to reduced the size of content. Its works fine. Please how to Resolve this.