DNS headache

Ok, I'm stuck. I have setup a domain controller at home and all seemed to be running well on Win2K advanced server. I added a system to the network running win2k professional, gave the appropriate rights and permissions but wanted to restrict some other policies. Now on the DC if I try to open Doman Security policies or domain controller policies I get an error that refers me to a DNS problem. I'm logged in as the admin so I have the right permissions.
Any sort of input would be appreciated. I just haven't gotten this far in my studies yet and have limited time to figure it out.
Thanks

Do you have Active Directory integrated DNS or the regular kind? What is the exact error?