The cart deposits a cookie and recognizes you when you click on the site... you will still have to login to purchase. If the above is not working you could try emptying your cache and cookies make sure you are not on Aimee Asher site and then restart your browser and try again.
If this does not work, you could also try restoring your browser settings to default.
Internet Explorer's security issues are causing troubles for many online shopping carts. You could always try downloading a free browser Firefox.
Please, let us know if we could be of further service.