help cannot join the domain with windows xp pro

HI MY NAME IS TONY
 I JUST recently installed a domain and i'm having problems it's a windows 2000 advanced server with 25 calls now installed and everything but when i try to join the domain with the xp o/s i cannot join it some reason i can ping the pc acces is but run \\the ip but cannot join them it tells me Note: This information is intended for a network administrator.  If you are not your network's administrator, notify the administrator that you received this information, which has been recorded in the file C:\WINDOWS\debug\dcdiag.txt.

The following error occurred when DNS was queried for the service location (SRV) resource record used to locate a domain controller for domain vanettizl.com:

The error was: "DNS name does not exist."
(error code 0x0000232B RCODE_NAME_ERROR)

The query was for the SRV record for _ldap._tcp.dc._msdcs.vanettizl.com

Common causes of this error include the following:

- The DNS SRV record is not registered in DNS.

- One or more of the following zones do not include delegation to its child zone:

vanettizl.com
com
. (the root zone)

For information about correcting this problem, click Help.



how can i know if i have the dns server properly instlalled please help ?????????????????????