Publishing the Key Management Service (KMS) to DNS failed

[Guest]

I have installed Vista Enterprise and setting up the KMS,
I following the step form MS website
http://www.microsoft.com/technet/windowsvista/plan/volact1.mspx

But after I check the event log, I find the following error

Is it any thing I missing during setup or I need any additional config for
DNS server?

Because I check for dns server, it already have a record for my old vista
(does not config as KMS, ject active online using KMS key), but I have delete
it.

Should I wait for KMS for 2003 or contious use vista for KMSS ?
=================error log =============
Publishing the Key Management Service (KMS) to DNS in the 'IP' domain failed.
Info:
hr=0x8007232A
====================================