Hi. This is my first post!

Just installed Outlook 2010. Each time I go into it I get the "Microsoft Mail Dialog" window (enter the postoffice, mailbox, password). Each time I Select the Save My Password option, but it never works. Does anyone know how to fix this? I have already tried to go into File, Help, Tools - but I can't find an Account Settings window where I could make sure the 'save my password' is selected.
I'm using Windows XP.