Ok, sorry for all my posts, but now on my NW6.0 SP5 Zen7 Workstation
Import screen I receive the following error:

javax.naming.NameNotFoundException [Root exception is
com.novell.service.jncp.NDSException: ccode = -601 (0xfffffda7)]

I just finished upgrading the server from Zfd4.01 to Zen7.01. Majority
of our workstations are 2000/XP (4.01 agent installed) and a few old
98 machines (who knows what agent they have... :))

Thank you everyone for your help.