Problem joining Windows 7 to Windows 2003 server R2

The Following error occured attempting to join the domain

An attempt to resolve the DNS name of a domain controller in the domain being joined has
failed. Please verify this client is configured to reach a DNS server that can resolve DNS
names in the target domain.

thats the exactly problem when i joining my windows 7 to windows 2003 server R2
what the possible solution.. what do you think its a one of the imcompatibilty between the 2 OS???

Thanks and i wait for the reply