WebPlus X6: Access Control on ipad problems

Hi. I have set access control security to a page on my site. When I view it on my laptop in either firefox IE or Chrome, it all works fine.

When I try to view it on my ipad, nothing happens. I click the hyperlink which should bring up the SWR automatic client access login box, but nothing happens, the ipad screen just blanks. As millions of people view the internet via their ipads, I need a solution to this. Can anyone help me with this please?

Thanks.