centering

Alright, I'm fairly new at uploading and designing websites. I just finished updating mine and have yet to figure out how to center it in the browser. I know practically nothing about HTML or Java or any of that. I only used Flash MX 2004 professional and used a lot of the basic action scripting and what I've learned in some tutorials. It has a publishing option to center the movie but it doesn't seem to work. Can anyone help me out on what to do? Please be as detailed as possible. You can check out my site at www.jeremytomsart.com It may look like it's center on some computers, but trust me it's not. I just made the stage large enough to appear more in the center. Any help would be greatly appreciated. Thanks in advance.

go to File>Publish Settings, click on the html tab and where it says dimensions, set it to percent.