QNTC and Windows mirroring

I have a customer that has some kind of mirroring going on between two
machines, call them A and B.  On the AS400, I have a links to directory
Users on both machines, i.e.

ADDLNK OBJ('/QNTC/A/Users') NEWLNK('/A')
ADDLNK OBJ('/QNTC/B/Users') NEWLNK('/B')

I have the same userid and password on the AS400 as on the PCs in question.

Using Windows Explorer, I can see \\A\Users\somedir\somefile and
\\B\Users\somedir\somefile.

Using WRKLNK, I can see /A/somedir, but no files at all, and cannot see
/B/somedir (although I do see other directories on /B).

Authorities (according to Windows Explorer) are the same on both machines.

 Message . . . . :   Unknown system state.

   then retry the operation.

And there are no other messages in the joblog.

Any idea what's going on?  I think they're running Windows Server 2003;
the AS400 is v5r3 and WRKPTFGRP shows

PTF Group             Level  Status
SF99530                6142  Installed

Peter Dow
Dow Software Services, Inc.
909 793-9050