login script sometimes will not run on some pc

nt4 domain controllers with w2k clients, login script runs from user profile, we have a few computers that the login script does not run i know it does nto run because we map drives on the script and if the script does not run the drive mapping will not be there. 90% of the PC’s in the network runs the script only a couple will not run, when we reboot then the script runs, users turn their pc off at night. is there a way to see which nt4 domain controller my w2k workstations logs on? i have nto done the pre dom i wanted to see why these few pcs will not run the script it sees the profile becasue the home directory gets mapped which is specified in their profile we do not use romaing profiles