Log On Scripts

I have a single domain network, running NT 4.0, with three servers. Mobile users with notebooks normally log on at a remote site and the .bat script runs from the server at their location,lets say server A and maps drives to network folders. The same thing happens when he logs on to server B,at a different location, the script on that server runs, and maps to those folders on that server, both notebooks using win98. A win2000 client, with the same user settings, will log on to server B, and thescript from A runs, and maps to those drives.
Does Win2000 handle scripts differently that 98? Any help would be great.
Tom