Netware 6.5sp3 Zen

I am getting the 1456 error when trying to remotely control some of my
workstations. I have read the TIDs and search this forum for
solutions. It appears a lot of people are having the same problem, but
there is no true resolution.

I have deleted workstations and let them reimport. This will work for
the first time I try to remotely control, but then I get the 1456 error
again. I have manually unregistered and re-registered the workstation
and set the preferred connection in the registry -- again that works at
first, but not in the long run.

Right now I'm pushing out the preferred connection registry change in
certain user's login scripts. That will work for about half a day and
then it error with 1456 again.

Is there anything else I can try?? Has anyone come up with a true
resolution yet?