My Windows 2000 server (172.16.1.1) is being used as a dns server. I have setup forwarders pointing to my public ISP dns servers(208.x.x.x). When i specified the dns options for my dhcp clients to use my internal dns server it only works for awhile then clients can't get out to the internet anymore even unable to ping any routable addresses. The only resolution I have for my clients is to point to the public ISP DNS servers in dhcp options. I check in event viewer and states the following error: "Registration of the DNS record.'gc_msdcs.JJG-CORP.NET 600 in A 172.16.1.1 failed with the following error: DNS server unable to interpret format" Any clues or links to help, thanks.