Password server loop

[wsteffen at bwn.net]

We are running Samba on a HP-UX system running NIS for both
host and UID/password resolution. When a client tries to access
the shares, in the client log file on the server we get the 
message:
Password server loop - disable password server rcnfs  password
server not available.

The server is rcnfs and the clients are WindowsNT systems.
Can anyone shed any light on what might be causing this??

Thanks
Warren
Steffen