okay… I’ll bite…
There is no sidebar displayed, because their is none prescribed in your HTML output (source code)- which is for discussions sake a rendering of your themes php files.
I (we) can’t see your php because by definition it is Hypertext Preprocessor language/script. It is there and then it disappears, and leaves behind a HTML or an XHTML document so the browsers know what to show.. It is necessary for dynamic generation of content.
It sounds as if I am not going to help you, but I am… hang with me..
The php file that controls your header and footer are indeed there, as we can see the results of that in your page source, so what is missing is the part of your theme that puts together and renders your sidebar..
possible reasons for a missing sidebar:
1. mis-named file. I am not familiar with your theme, but many themes use a file called sidebar.php to handle the sidebars. Yours may not be named correctly or may be absent or may be in the wrong location. Check that. It should be in the same directory as the rest of your theme files, and it should be called the right thing. How to find out what it is suppossed to be called you ask?
2. Look in your theme files. It may be in your header.php (or file that controls the header) or it may be in your post.php file (or file that controls the generation and display of your actual posts)or could possibly be in your footer.php, but either way there will be a php script something to the effect ?include sidebar.. maybe it isn’t named sidebar… but you need to find out what it is called and make sure that name matches the file that does control the sidebar…
from there we can all chip in and help.
good luck!