Hello,
I figure out what was the permission that allowed the Administrator to open up the form correctly without having it prompt for login and others not - seems that when I give the Manage Site Groups to a user- group , it will make the form work.
However I do not feel comfortable with giving each user-group the permission to " Create, change, and delete site groups, including adding users to the site groups and specifying which rights are assigned to a site group. "
I don't really see any connection or any logical reason why this particular permission will allow users to open up the form correctly.
Have you ever seen this type of problem before?
Thank you in advance,
Monica