Technical support

I am facing a problem I have exiting exchange server 2003, When I used Nslookup command DNS request time out

c:/…..>Nslookup
server: mail.”company”.com
Address: 192.168.1.2

>www.google.com (first request)
server: mail.”company”.com.
Address: 192.168.1.2

DNS request timed out
Timeout was 2 seconds

DNS request timed out
Timeout was 2 seconds