What DNS server software are you using?
What OS are you running?
Are you running from cd or hard drive?
How was the DNS server set up?

Post details of what you have done and your computer's hardware/software configuration. We can't give you the help you seek without details to work off of. Since I don't have the details of your particular configuration, here's a link with some info on how to set up your dns server:http://support.open-rsc.org/unix/.

HTH,

Durand