[Samba] Error creating host keytab

[Shaw, Kevin]

I am running Samba 3.0.35. When I run net ads join or net ads keytab create I see that the keytab file cannot be created. Here's a portion of the log:

[2013/03/20 07:57:50, 3] libads/kerberos.c:(337)
  kerberos_secrets_store_des_salt: Storing salt "host/pitviper.DOMAIN at REALM"
[2013/03/20 07:57:50, 2] libads/kerberos_keytab.c:(260)
  ads_keytab_add_entry: Using default system keytab: FILE:/etc/krb5/krb5.keytab
[2013/03/20 07:57:50, 3] libads/kerberos_keytab.c:(184)
  smb_krb5_kt_add_entry: adding keytab entry for (host/pitviper.DOMAIN at REALM) with encryption type (1) and version (8)
[2013/03/20 07:57:50, 1] libads/kerberos_keytab.c:(189)
  smb_krb5_kt_add_entry: adding entry to keytab failed (Cannot write to specified key table)
[2013/03/20 07:57:50, 1] libads/kerberos_keytab.c:(346)
  ads_keytab_add_entry: Failed to add entry to keytab file
[2013/03/20 07:57:50, 1] libads/kerberos_keytab.c:(508)
  ads_keytab_create_default: ads_keytab_add_entry failed while adding 'host'.
[2013/03/20 07:57:50, 1] utils/net_ads.c:(1647)
  Error creating host keytab!
Joined 'PITVIPER' to realm 'REALM'
[2013/03/20 07:57:50, 2] utils/net.c:(1075)
  return code = 0

I've tried creating /etc/krb5/krb5.keytab with no luck. Any ideas?

TIA
-Kevin