Can't change kerberos password

[Tyson Oswald]

I have kerberos authentication installed on my Solaris 8 x86 machine, and I can login fine using my AD credentials.  When I try and change my password with kpasswd I get the following error 'kpasswd: unable to get host based service name for realm myrealm.net '  I have the krb5.conf file pointing to our AD domain controller.  Is there any special setup for kpasswd in the krb5.conf file?
 
thank you,
Tyson Oswald