Vista - full email address as username

i own a domain(justwrong.com), and have it hosted on a mail server at an
isp(mail.wmol.com). i am able to check my mail with OE by putting the entire
email address(admin@justwrong.com) as the username. when trying the same
with WM it keeps asking me for the password. I can only assume from this
that the problem is WM is taking the rest of the email address off, and only
sending the characters before the @ . does anyone know if this is true, and
if so, if there is a way to make it transmit all characters to the mail
server?

i have another account with the isp that is just a username and password, it
works, so i know i have the incoming and outgoing settings right. below is a
copy of the error i get after attempting 3 times.

Account: 'justwrong', Server: 'mail.wmol.com', Protocol: POP3, Server
Response: '-ERR admin logon failed', Port: 110, Secure(SSL): No, Server
Error: 0x800CCC90, Error Number: 0x800CCC92