Cannot resolve network address for KDC in requested realm while

[ramalingam balaji]

Dear sir,

        When I join the windows 2003 domain using the command kinit, while I am getting the error "cannot resolve network address for KDC is requested realm while getting initial credentials"

        Another one when I join the windows 2003 domain using the command " net ads join -U administrator" I am getting following error 
   "utils/net_ads.c:ads_startup(186)
    ads_connect:No such file (or) directory"
So kindly send the mail How to rectify this problem.

With Regards
R.Balaji