I have configure my DNS and its able to work. I hav even configured a mail server for that DNS. Now when am giving the ServerName field as the DNS,i mean www.host.com, its not working. Can anyone help?
Thanks in advance

what do you get when you enter the dig command for your host? And can you get to the web server from a local browser using 127.0.0.1 ?

; <<>> DiG 9.2.4 <<>> www.host-mailserver.com
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 12560
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1

;; QUESTION SECTION:
;www.host-mailserver.com. IN A

;; ANSWER SECTION:
www.host-mailserver.com. 86400 IN A 192.168.24.6

;; AUTHORITY SECTION:
host-mailserver.com. 86400 IN NS host-mailserver.com.

;; ADDITIONAL SECTION:
host-mailserver.com. 86400 IN A 192.168.24.6

;; Query time: 38 msec
;; SERVER: 192.168.24.6#53(192.168.24.6)
;; WHEN: Thu Dec 22 22:19:41 2005
;; MSG SIZE rcvd: 87

ok, so the DNS and web server are on the same machine and presumably you are trying to access your web sever only from within the local network (192.168....) or from on the same machine, right?

You should be able to bring up a browser on that same machine and retrieve web pages using either the host name, 192.168.24.6 and 127.0.0.1. If not, I'd suspect a web server configuration issue. Also try netstat -ln to see if the web server is up and listening on port 80.

yes, its listening.
So, withour IP address if i want to use my FQDN in my LAN, how should i configure the Apache further,.

Check the DNS caveats article at http://httpd.apache.org/docs/2.1/dns-caveats.html -- that might help solve your problem.