Problem loading external HTML in IE 6, 7

Problem loading external HTML in IE 6, 7

Hi there!
I'm using the .load() function to add some external HTML to a div.
It works fine in IE8 and FF but doesn't work in IE 6, 7.
Any hints?

$(document).ready(function()
{
   $(function ()
   {
      $('#content').load('aboutus.html');
   });
   $('#services').click(function ()
   {
       $('#content').load('services.html');
        }
});