If I use "file -> open site" from front page, it fails instantly: "The folder "http://www2.mysite.com/' isn't accessible. The folder may be located in an unavaible location, protected with a password, or the filename contains a / or a \."
This is a very consistent problem. If the server hosting a frontpage web uses my current username and password, these get used via pass-though and the web can be opened. If the server hosting the web does not know my local username and password, then the connection fails without asking for a username and password.
If I go to a WINXP computer running frontpg 2003, there is no problem. The authentication request is made, I type in valid info and the site opens.