username greyed in mac mail

Hello Fellow mac-users,


I am just wondering whether this is an expected behavior or not. I have mobile me setup in my macmail(3.5). I currently own a MBP late 2008. All my software are up-to-date. I suddenly ran into this problem where I click on the accounts pane of the mail preferences. I check on the incoming mail server which was editable however the "username" is greyed out. Is this normal?if not please let me know how to fix it

Cheers