vCAC 6 inaccessible from IE 8 on Windows XP

Hello, can anyone tell me if they have successfully accessed vCAC 6 using IE 8 on a Windows XP client? When we try and access vCAC 6 from a Windows XP client running IE 8 the login page does not load. If we try the same test using Chrome the page loads successfully. The problem only seems to relate to Windows XP and IE 8, as the same test works from a Windows 7 client running IE 8.