Novell Drive mapping crashes 2k explorer

we are mapping several drives with the novell logon. everything seems OK until you open explorer (my computer, my documents, windows explorer, ext) at that point explorer crashes and reloads. nothing is writen to the event viewer and dr watson simple say that explorer crashed and was restarted (as if I could tell). We did find that if we map the drives from the root ie. cosnds\cos\downtown\ours\location\servername\directory instead of servername\directory it works fine. We have no idea why.
OS2000 Pro
Novell client v4.71
Novell servers v4

any help would be usefull
Thanks
Tony