Windows 2003 dropping UNC file connection to Netware 6.5 server

Hi

I’m having a very complex problem and hope someone can help. We have 2
Win 2003 servers (production and developmental). Both boxes need to
communicate with a Netware 6.5 server via the Netware client 4.9
sp2. We are running an app on both win servers that require user
authentication to a NW 6.5 server and the rights to save documents to a
folder. The app running on the Windows 2003 needs to establish a UNC path
connection
to the NW 6.5 server at all times. For some reason we are not able to
establish this
connection after both Win 2003 servers boot up. Once we establish the UNC
file connection manually the app running on the Win 2003 server works fine.
The even larger problem we are having is the UNC file connection drops
problem is after an hour or so the.

We can successfully maintain a consistent connection with mapped drives
from a login script. But this software app needs to communicate with our
NW 6.5 server via a UNC connection. When we restore the UNC connection
manually the app works fine. However after an hour or so we again lose
the connection and the app doesn’t work. This only seems to happen on
these Win 2003 servers and when it involves the UNC path. Win 2k and XP
works just fine.

We tried the following:

Contacted the software app vendor (software works fine on Win 2003 server)

Installed Win 2003 Client service for NW but the app needs authentication as
NW
user.

We disabled all power saving functions on the NIC card and PC of both Win
2003 servers

We updated the NIC card drivers on the NW 65 server.

We contacted Novell but they have not resolved the issue. The proble seems
to point to Windows 2003. I would appreciate any help you can provide.