CSS DIVS problem with Internet Explorer

Hi, right, this could be one of my more ridiculaous problems, but I am in serious need of help...
I have got two websites, one in the process of upgrading, both on the same server, and both identical-ish.

My old one used to have a problem with its div content when displayed in IE, but, it still worked.

I have now re-build the site on a new server (same host) and it is totally f**ked up big time.

The CSS is the same script, as is the html. If you take a look at these links with firefox, you see both identical-ish, and perfectly healthy websites.
Take a look in IE, and you will agree there is something gone terribly wrong... But What???

Old Server: "http://www.pcgenius.hyperphp.com/"
New Server: "http://www.pcgeniusproductions.com/"

Old server displays fine in all browsers, including IE, but New server displays in all BUT IE. Both have identical scripting (to an extent, I just seperated the css into their own .CSS files for each section of the site) and all is linked well.

I have heard of FF displaying divs wrong, but not IE.

Is there not some kind of IE fix?

Thanks in Advance.