Can not see domains in kerberos mode

[Arup Biswas]

[global]
netbios name = abiswas-linux
server string = arup's linux server
security = domain
smb passwd file = /usr/local/samba/private/smbpasswd
encrypt passwords = Yes
workgroup = cadevdc04.cifs
realm = cadevdc04.cifs
dos charset = ASCII
wins server = 10.20.6.204
restrict anonymous = 0
smb ports = 445 139
client signing = auto
server signing = auto
lock dir = /usr/local/samba/var/locks
pid directory = /usr/local/samba/var/locks
log level = 10
log file = /usr/local/samba/var/log.%m
private dir = /usr/local/samba/private
dos filetimes = yes
dos filemode = yes
mangling method = hash2
map archive = no
disable spoolss = yes
strict sync = yes
oplocks =  no
winbind uid = 10000-20000
winbind gid = 10000-20000
name resolve order = wins hosts
max smbd processes = 00000

[sim_share                                                                   
                                                                             
                                                                             
             ]
comment = this-is-simulator-share
path = /tmp
read only = No