Csan't log in to Norton Online Backup

I'm trying to add a computer to my exisitng online back up account.  But when I go to the login page with the add'l computer, my browser pulls me away and says it can't find the page.  I de-activated my popup blocker, but no change.  I see the page for about 2 secs, but before I can start keying in my user name/password, Explorer pulls away and says it can't find the page.  What's up?