In order for this site to work it needs to create 'cookies' to store session information for functionality and your own security protection.   By default, Internet Explorer 6, and even more so IE7, has a more restricted cookie 'Privacy' policy  than IE5. 

To change this setting in Internet Explorer go to Tools-->InternetOptions and go to the Privacy Tab.

You can now either move the slider to the bottom to allow all cookies, or just add this web site as follows.

Tools-->InternetOptions

Go to the Privacy tab and click on the Sites button

Add 81.2.89.139 as an allowed site