DOS server also works in client mode?

This is a question about Microsoft Network Client 3 for DOS and the classic
modification to add server capability.

I have been knocking my brains out with a small start-up business that must
work with an old DOS Point-Of-Sale system for the moment. All of the
Point-Of-Sale stations can use the plain DOS client except one. That one
needs to act both as a print server but also as a client to the file server.
Using Johannes Helmig's excellent old article "DOS-based Microsoft Network
Server" on modifying the MS Network Client to act as a server, I am able to
get the machine to act in server-only mode. But when we try NET USE for
connection in client mode, we get the error message "Redir not loaded."

I have never tried to get a DOS machine acting in both client and server
modes simultaneously (with the modified Network Client 3). Can we do that?

Perhaps I should add that we currently have the network configured only for
NetBEUI protocol, if that makes a difference. (I have found that TCP/IP
configured for DHCP doesn't work with many switches due to their
non-compliance with a certain DHCP setting. So I am trying to work simply
with NetBEUI rather than setting up TCP/IP with static IP addresses.)

--John Hupp