While I should comment that NT 4.0 has a blatent security issue that was never fixed, you are not at the latest Service Pack 6a (or later?) so I would never expect this to operate without a hitch.
Also, Microsoft changed the logon encryption method and NT might be left in a lurch since it's support is long dead. There is a workaround for that and your IT should know the drill. It's called "clear text passwords". If your IT can't do this, or is unaware then send them back to school.
Sorry to seem so blunt about it, but it's dead, Jim.
I have a worskt running win xp pro in a network that still is running win nt server 4.0 spk 5, when i upgraded that machine to winxp spk 2 a couples of the drives mapped in that machine to see the server drive they were not availables, so what i did was restore the win xp spk2 machine to his original settings to win xp, cause i did not know what to do, i just want to know if you can help me here what should i do if i want to go to the win xp spk2 again and solve this problem, seen to me like i was not able to have access to those drive cause some kind of security issues where installed can you please help what should i do to solve this, so that will help me to upgrade that machine and two other ones i have.