Internet Explorer Left Centering Table Issue- Working w/ Firefox

When the two top tables of the site below are opened in windows explorer it is left centered instead of correctly centered like it appears in Firefox. I am looking for the solution to this problem so that the site appears in IE just as it does in Mozilla firefox. The basic site structure is in simple tables w/ images and flash content loaded. You can view the problem at [login to view URL] ## Deliverables The solution to the problem above to allow the top tables of the site to center in IE just as it does in Firefox. Any description necessary to make this possible. ## Platform windows xp