Outlook 2003 and password

I updated Spyware beta last night and now I am being prompted for username
and pwd every time I try to send an e-mail in outlook

Basic POP / SMTP e-mail config, password is saved. when I send an e-mail
the pwd comes up filled in, so all I need to do is hit OK to send e-mail,
but it is annoying.
as soon as i disable MS AntiSpyware Beta, Outlook stops prompting me for
pwd.

Anyone else run across this?

Win XP Pro - SP2, MS Office 2003 fully patched, McAfee Desktop FW, McAfee
V-Scan

Tim