kadmind, Wrong principal in request

[ms419@freezone.co.uk]

Trying to run "kadmin":
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[fis:~] jablko% kadmin -p admin -r RUZ.LAT
Authenticating as principal admin with password.
Password for admin at LAT:
kadmin: GSS-API (or Kerberos) error while initializing kadmin interface
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And on the admin server:
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Apr  3 23:57:24 wum kadmind[18547]: Authentication attempt failed: 
192.168.179.43, GSS-API error strings are:
Apr  3 23:57:24 wum kadmind[18547]:     Miscellaneous failure
Apr  3 23:57:24 wum kadmind[18547]:     Wrong principal in request
Apr  3 23:57:24 wum kadmind[18547]:    GSS-API error strings complete.
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Everything else works - including cross realm authentication. 
"krb5.conf" should be fine since the admin server, "wum", reacts to the 
connection. I've double checked DNS: Forwards and reverse work fine on 
client & server. "kadm5.acl" on the admin server contains:
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admin	*
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What does this error mean?

Thanks!

Jack