kerberos issue with pgadmin3 in windows

Hi guys, I have a Kerberos problem connecting from windows XP SP3 to a
postgresql 8.1.18 database running on rhel 5.5.

Pgadmin3 says Error connecting to the server: pg_krb5_init:
krb5_cc_get_principal: No credential cache found

I have the variable PGKRBSRVNAME set to POSTGRES (same value is set in
krb_srvname in postgresql.conf)
I have modified the registry
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Lsa\Kerberos\ as
suggested here :
http://archives.postgresql.org/pgsql-jdbc/2010-07/msg00034.php

I'am using pgadmin3 version 1.10.2
Any help will be appreciated

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