Domain Issue with WIndows Server 2008 and Windows Vista

Im running a Windows 2008 Server as both an Active Directory Domain Server and a DNS Server and Im testing on a client laptop machine running on Windows Vista Business sp1. Im in an active directory domain in which both computers and a couple more servers are members.

The problem is that the client cannot resolve domain names using ping fqdn and nslookup. It can however ping other computers using ip addresses but cannot ping itself using its own ip address.

The other two servers can successfully ping using fqdns and ip addresses but cannot nslookup ip addresses. Pinging the client (laptop) however is unsuccessful for both ip and fqdn.

I can see all computers on ‘network and sharing center’ from all computers and thus I do not understand why this problem occurs.

If anyone is willing to point me to the right direction i would be very grateful