Win2K WS – NTFS or FAT w/ NT Server

I’ve been setting up New Gateway computers with Win2k out of the box and some of the machines have an NTFS file system and some have FAT. I’ve notice the workstations with the NTFS file system don’t show up as active under Server Manager on the NT 4.0 server
when logged on. I’m trying to figure out how to get them to show active so
I can’t tell who is logged on as WS001, etc.