Joining windows xp with Domain win2k3

Hi, i am have installed windows server 2003, and i have setup active directory….Domain named ABSM.

i do not know what do next, for this active directory in windows 2003 server. to join the windows xp.

secondly i tried to join. from windows xp.. but i got some strage error.
plzzz tell me or help me..
Thanks
Salman.