yppasswd fails on 5.1 box

[Guy Van Sanden]

Yppasswd fails on my 5.1 box (has always worked on 4.5 to 5.0) with
"yppasswd: pam_chauthtok(): error in service module"

There's also a syslog message:
Nov  4 22:54:54 *** yppasswd: in pam_sm_chauthtok(): yppasswd_local():
failed to connect to rpc.yppasswdd: ***: RPC: Program not registered

Yet rpcinfo -p shows:
    100009    1   udp    821  yppasswdd
    100009    1   tcp   1010  yppasswdd


Any suggestions?

-- 
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Guy Van Sanden 
http://unixmafia.port5.com  

Registered Linux user #249404 - September 1997
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