Re: XP and Vista sharing
Have you configured both NTFS and Share level permissions on Vista?
On my Vista box at home, for example, I have a share setup with permissions like....
Drive F: (Backup)
Network Share Permissions
Everyone - Full Control
Everyone - Read Only
Quinton - Full Control
I have a local user named "Quinton" on both the XP box and the Vista box using the same password. If the passwords are different, you'll have an authentication issue.
Did you say you were running a domain, though? If so, make sure that you are logging in to your XP machine with your domain credentials and that when you are adding users to the NTFS and Network share permissions on the Vista box that the Vista box is added to the domain. Also, make sure the users you add are formatted "DOMAIN\User" when configuring permissions.