[ActiveDir] DDNS Registration Problem

[Wright, T. MR NSSB]

Hello All,             I have this problem with a handful of machines, they refuse to dynamically register in the AD DNS.  The machines were registering at one point in time, but at some point they stopped doing so.  I stumbled upon this because I was working on one of these machines and when I would try to contact it by name I would actually get a different machine.  What had happened is the old DNS records were still there and it had not updated itself when it got a different IP address from the DHCP server.  I have since deleted the old DNS entries and when I try to force DNS registration nothing happens, and I get zero errors in the event logs.  The reverse records are registering properly, when I do ping –a I get the correct name.  When I do an NSlookup I get “host not found”.  The DHCP and DNS services on the client are all running fine.  The domain is Win2k SP4 and the clients are WinXP SP1, I have about 6000 clients that have no issues and these 20 machines which are having problems.  The only other thing that I found out of norm on these machines is that RRAS had been started.  I have since stopped and disabled that with no change.  Any help is appreciated.  Thanks,     -Tim