Theme aligment problem?

Okay, so I finally got my HTML layout converted to a WP theme. Now, the sidebar/main conent is out of wack. Please tell what I did wrong?

Here are the files in .txt format 🙂

http://audioh.po.gs/helpfiles/header.txt
http://audioh.po.gs/helpfiles/footer.txt
http://audioh.po.gs/helpfiles/sidebar.txt
http://audioh.po.gs/helpfiles/index.txt

Here is my site to see what it looks like.
http://audioh.po.gs/