Theme Tesseract – Sidebars

Hello, I’m using Teserract ( Tesseract 1 by Tyler Moore) theme, and I would like to use sidebar to put recents posts , or google adsense ads, but apparently I don’t know how to make it appear. How do I activate those to appear in my posts. As you can see in a screenshot, middle of post page is occupied by a content but both sidebar areas are empty.

Here is link to screenshot : http://oi68.tinypic.com/2kospu.jpg