cookie question

[mono3]

I have IE9 Privacy settings block First and Third party cookies. I don't have any permanent cookies and don't want any, but I can't seem to load this site without allowing realtor.ca in my IE cookie list and completely Bypassing Proxomitron with sidki config

http://www.realtor.ca/map.aspx

What is the right way to handle it without allowing permanent cookies? I thought all cookies were converted to session cookies, but I'm stuck on this site. Has something to do with virtualearth since http://dev.virtualearth.net/mapcontrol/m...&mkt=en-CA doesn't load (it is 0 length in the http://local.ptron/.pinfo/urls/ log list, if prx is not bypassed and that realtor cookie allowed).