I have migrated server 2003 to server 2008 and transfered fsmo roles to 2008 std dc,

I run dcdiag and netdiag , dns test failed warning cannot find a primary authoritative dns server for the name dns entries for this dns not registered correctly on dns...

how to fix this issue, it looks dc is not healthy,

"I believe in dcpromo , dc replication we need not to migrate dns, i think it a
utomatically migrates data from 2003 server to 2008 std"

Please advise me to fix this issue