commodore

www.hot.ee/warriorsoflightning
Why doesn't the bottom image show up?
How can I center it? I'm used to <div align="center">, but it doesn't work this time.
Why does the background work like those buttons?
How can I remove the space between <ul> and <div id="conttop">?

The css is here: http://www.hot.ee/warriorsoflightning/stiil.css

It's the first time I use css. I used to do sites with dreamweaver. Now I'm coding it myself.