Hello Anne,
Can you please refer to these two links to see if this helps you understand what's happening:
http://support.dotnetnuke.com/issue...5&PROJID=2http://www.datasprings.com/Products/Product-Forums/tabid/727/forumid/3/tpage/1/view/topic/postid/16839/Default.aspx#16843
If you have any questions please let me know.
Thanks,
Ryan