integrated windows security requests user name and password...

[Rea Peleg]

Hi all
I'm trying to set iis 6.0 on a w2k3 server.
My test site's security is anonimous access + integrated windows.
This site is very simple...just one html page.
I have also granted the iis anonimous user account, credentials on the
site's ntfs directory.
After this i am still being asked to enter windows user name and password..
If i skip this part or enter errouneous data i get the 'you arenot
authorized to view this page'
error..
My questions are:
1)Why am i asked at all to enter windows user details?? Isn't it suposed to
be transparent
when security is set to 'integrated windows'?
2)If i discard the windows authentication stage - should not i be recognized
as an anonimous user and still get its permissions?

Thanks alot for your attention
Rea