Outlook 2003 won't connect

[Petr Kuba]

I am running WinXP pro CZ SP2, Office Cz 2003 SP2, which is Outlook 2003 and
FireWall Client for ISA Server 2004 and F-Secure Anti-virus Client Security.

Since then my email will not recieve, when I connected via net-card.
I get error messages, (0x80040900). My
internet provider has checked my settings, and they are OK. I can get my
email if
I use Outlook Express.

If I connected with phone,I can get my email if I use Outlook 2003.