[SOLVED] Widget Content's Missing In Widget Editor

My Atahualpa verion is 3.4.1. The problem is that I am not able to edit/remove/move the contents in my sidebars since I can't find the default contents of the sidebar widgets like categories, archives, blogroll etc inside the widget editor sidebar tabs. The sidebars are all blank. How do I make the items show up in my sidebar and how do I edit them? I have the older version in my other site, but it doesn't have any problem.