将linux的主机加入windows server 2003 ad域中？

ah007

给为大大，小弟我有个问题请教：

我实验的环境是redhat linux 9.0
krbafs-1.1.1-9
pam_krb5-1.60-1
krb5-server-1.2.7-10
krbafs-devel-1.1.1-9
krb5-workstation-1.2.7-10
krb5-devel-1.2.7-10
krbafs-utils-1.1.1-9
krb5-libs-1.2.7-10
我在/etc/krb5.conf文件中也按照论坛中的设置方法设置好了，但是就是提示：
kinit(v5): KDC has no support for encryption type while getting initial credentials
我ad域名是www.mytest.com   

我的/etc/krb5.conf配置文件如下：

[logging]
default = FILE:/var/log/krb5libs.log
kdc = FILE:/var/log/krb5kdc.log
admin_server = FILE:/var/log/kadmind.log

[libdefaults]
ticket_lifetime = 24000
default_realm = WWW.MYTEST.COM
dns_lookup_realm = true
dns_lookup_kdc = true

[realms]
WWW.MYTEST.COM = {
  kdc = testpc.www.mytest.com :88
  admin_server = testpc.www.mytest.com :749
  default_domain = WWW.MYTEST.COM
}

[domain_realm]
.www.mytest.com = WWW.MYTEST.COM
www.mytest.com = WWW.MYTEST.COM

[kdc]
profile = /var/kerberos/krb5kdc/kdc.conf

[appdefaults]
pam = {
   debug = false
   ticket_lifetime = 36000
   renew_lifetime = 36000
   forwardable = true
   krb4_convert = false
}


请高手指教？