Posted 23 April 2012 - 12:59 PM
Is the server setup as a domian controller? If it is then the XP machine will need to join the domain before it can see the server or use RDP. When you try to use RDP what kind of error do you get? If there isn't a domain then both machines will need to be a member of the same workgroup in order to see each other.
RDP only uses DNS if you are trying to connect by server name. Try connecting by server IP to see if that helps. If it doesn't then the problem isn't related to DNS.
Get your facts first, then you can distort them as you please.