I have a simple authentication header in some ASP pages which queries an Access database to authenticate and then stores information in a couple session variables. This works just dandy on all clients except Windows XP Pro (haven't tried Home version yet). I'm thinking this is a common problem because I am having the same problem at work except the database is SQL Server. The first is running on XP Pro and all clients authenticate fine except for the XP Pro server itself. The second is running on Windows 2000 and all clients authenticate fine except a client running XP Pro. I'm thinking this is really related to the session variables, but I thought this would be the place to ask. Any nudges or shoves in the right direction would be greatly appreciated.