IE apperance and Login

Thanks in advance to anyone who can help me!

I am currently working with a client and I have mad a site for them (the url of which is “dmdboi.com”) and I am currently pointing another domain to that site “http://www.countysligogolfclub.ie”

In every other browser this site(countysligogolfclub.ie) works fine but in IE it only shows the background image and footer and no pages or page content. Also when it was appearing when I went into members login and entered a valid user and password it told me I didnt have Permission(even though I was logging in as an administrator). But when I did the same thing in “dmdboi.com” it worked fine and let me login.

Sorry for the essay but having serious issues with this and I urgently need to fix this as offical launch is in 2 days time!!

Thanks again for any help its MUCH APPRECIATED!!