Please look at all the forum messages in this topic carefully,  [url=http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=4.msg15#msg15]all the steps (in detail) have been posted[/url].
I guess you did not read this forum messages carefully.
If you did read it and still did not understand it. Please at least indicate where you did not get it. ::)