windows authentication

From: Andrea (andrea.piatti_at_gaia.is.it)
Date: 07/25/03 

Date: Fri, 25 Jul 2003 13:26:52 +0200

Hi, I have a problem with windows authentication.
On some computer, when the user is not recognized, the windows popup login
dialog is not shown.
Does anyone tell me why?? How can I solve it?

Thanks,
Andrea.