Windows Live Mail on Windows 7 keeps asking me for my username & password for every email address that i am using

I have Windows 7 with Windows Mail and it keeps asking me for my username and password for all 10 e-mail addresses that i am using.  It is not my anti-virus nor my firewall as i am using Microsoft Security Essentials.  I have tried deleting and then adding back on these e-mails to no avail and i have also tried uninstalling Windows Live Essentials and reinstalling it but the problem is still there.  When adding in each e-mail i made sure to check 'remember password'. What else can i do??  Thank you.