Even though this is not a problem for me but there is a chance that it could be a problem for you. Sometimes no matter what you do, Outlook Express forgets your password and asks you to enter it again each and every time you connect to your mail server.I have a solution that may work for you.
Open Registry by going to START-RUN and entering REGEDIT and Navigate to
HKEY_CURRRENT USER\\Software\\Microsoft
and look for "Protected Storage System Provider". There is a good chance that you will see this folder. If you have it. Simply delete it. More than likely, you have solved your problem .