Hello.
I must say I don´t have a very clear image of what exactly are you doing from your description, but since you are talking about export and object selection, I suppose you are in CMSDesk and trying to export/import some site, or to create a new one using New site wizard. Anyway, you are in CMSDesk.
You did not specify what version of Kentico CMS are you using, but if 5.5 please note, that IE6 is not supported for content editors (
http://devnet.kentico.com/docs/devguide/index.html). Could you please try it on some real or supported browser and let me know, if it helps? Thank you.
Best Regards,
Radek Macalik