Page in Explorer < 8 doesn't get styled for some reason

I am setting up a page partly in HTML5 styling in combination with the ie7.js script (which enables html5 styling support). It worked before flawlessly, but now I'm using the same setup, the website comes up in IE6/7 unstyl开发者_如何学编程ed. I've been busy with it now for days and cannot find out why. Anyone that is able to find out what's wrong?

This is my head:

<!--[if lt IE 9]><script src="http://ie7-js.googlecode.com/svn/version/2.1(beta4)/IE9.js"></script><![endif]--> 

<link rel="profile" href="http://gmpg.org/xfn/11" />
<link rel="stylesheet" type="text/css" media="all" href="http://zzappservices.nl/wordpress/wp-content/themes/zzapp/style.css" />
<link rel="shortcut icon" type="image/x-icon" href="http://zzappservices.nl/wordpress/wp-content/themes/zzapp/favicon.ico" />

<!-- Scripts, CSS and settings specific targeted to Internet Explorer -->
<!--[if lt IE 9]><link rel="stylesheet" href="http://zzappservices.nl/wordpress/wp-content/themes/zzapp/css/ie.css" type="text/css" /><![endif]--> 
<!--[if IE 6]><link rel="stylesheet" href="http://zzappservices.nl/wordpress/wp-content/themes/zzapp/css/ie6.css" type="text/css" /><![endif]--> 

<!--[if IE]>
<link href="http://zzappservices.nl/wordpress/wp-content/themes/zzapp/css/ie.css" media="screen, projection" rel="stylesheet" type="text/css" />
<meta http-equiv="Page-Enter" content="progid:DXImageTransform.Microsoft.Fade(Duration=0.0001)">
<meta http-equiv="Page-Exit" content="progid:DXImageTransform.Microsoft.Fade(Duration=0.0001)">
<![endif]-->

The page works perfect in webkit/mozilla browsers.

One problem you might be having is due to the fact that your CSS stylesheet that is supposed to be included if IE < 9 is not there. Try visiting: http://zzappservices.nl/wordpress/wp-content/themes/zzapp/css/ie.css and you'll get a blank page.

It appears the IE 6 stylesheet is also not present. If allowed, you should be copying these files locally for your site for reliability.