Ack! More errors with IE 6.

A quick look at http://heritageccag.com/3/ in Firefox and Internet Explorer 6 or below shows that the navigation menus don't expand the whole distance of the alloted area. I'm pretty darn sure this is because I set the navigation to have a margin of -40 pixels. Instead of moving the nav 40 pixels to the left, it just cuts it off. Ideas? I also have the drop down menus set to -25 pixels, but I haven't been able to check that in IE 6 yet. I'm sure it has the same problem though.

Edit: I got it. If anyone else is interested, check this link.
Basically, just put position: relative wherever you have the negative margin.