I could only reproduce the issue with the popup position in IE, but I got it fixed.
Do you have an older version of Dreamweaver you can install the old version of UE on to update the page with?
I have attached a copy of the CDO_SYS version of the include file... if you are lucky you may just be able to replace that and it will all work. It has been many years since I've dealt with an ASP page, so I can't be sure but it is worth a shot.