[Samba] the problem of join samba3.0 to windows2000 doamin

[gzis at ek-chor-cn.com]

when i want to join the samba3.0 server to the win2k domain, it appear the
errors as below:

[root at honet6 samba]# net join -S gz -U is2000
is2000's password: ie2003bd
[2005/03/29 16:14:58, 0] libads/kerberos.c:ads_kinit_password(146)
  kerberos_kinit_password is2000 at GZ.LOTUS.COM failed: Cannot find KDC for
requested realm
[2005/03/29 16:14:58, 0] utils/net_ads.c:ads_startup(186)
  ads_connect: Cannot find KDC for requested realm

Unable to find a suitable server

Unable to find a suitable server

my smb.conf is as below: