To elaborate on what Jan is recommending to you, do the following in IE 6:
>Privacy (which should say Custom; if it doesn't see below where I talk about Advanced Privacy Settings and follow those recommendations first);
>in the window, type in www.luminous-landscape.com
>Click Allow, click OK; this will make this site trusted - IE6 will accept its cookie automatically;
>Go back to Privacy and click Advanced - you will get Advanced Privacy Settings
>Check the first box that says Override Automatic Cookie Handling;
>For first party cookies I select Prompt (so you get warned about those not on the list we determined above).
>For third party cookies I select Block (that is almost ALWAYS advertising and possibly a risk area)
>I check the box Always Allow Session Cookies, because these disappear after you quit the website you are viewing and this options eases web-browsing.
I've had no security or privacy problems with this combination of cookie-handling settings.