Security Help Pleeease!

[bigfoot]

I'm using Internet Information Server on NT 4.0.
I recently turned on basic security. We have a MAC LAN here so I could not use Challange/Response - they use Netscape. This is for an Intranet.
I can not get anyone to login. It prompts for a login, and then tells me no access. If I turn on Challange/Response, then it's ok.
I only have one folder set up this way. The main part of the site is set to Anonymous Access.

I have the user profile group set to domain user and user.
I thought It may me that they need login on the local machine like FTP.
When I put them in a group with IUSR_xxx account, it works.

I am so stuck - and so frazzled x-)

Thanks,
Gary

The door to life is never locked, but few have the knowledge to open it.