[Samba] Unable to connect samba server using hostname

[updatemyself .]

Hai All,

I am Unable to connect samba server using hostname
the thing is.. its happen only from few windows machine
in my network... but they can access the sambe share
using IPAddress.. as like all other machine

All the other Windows system in my network can access samba share
using both... IP Address and Hostname..
This creating a big headache for me.....
please suggest some solution to solve this problems...


Here is my smb.conf file configuration...

#=========================== Global Settings
================================
[global]

workgroup = MYDOMAIN
server string = Samba Server
log file = /var/log/samba/%m.log
max log size = 50
security = ads
encrypt passwords = yes
socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
dns proxy = no


#=========================== Share Definitions
==============================
#ldap idmap suffix = ou=emplist,dc=dqe,dc=com
password server = 172.16.20.200 <http://172.16.20.200>
realm = MYDOMAIN.COM <http://MYDOMAIN.COM>
idmap uid = 16777216-33554431
idmap gid = 16777216-33554431
template shell = /bin/bash
template homedir = /home/%D/%U
allow trusted domains = no
idmap backend = idmap_rid:DQE=16777216-33554431
winbind use default domain = yes


[vol08]
path = /vol08_700
writable = yes
public = yes
nt acl support = yes
create mask = 0755
security mask = 0755
inherit permissions = yes
inherit acls = yes
force security mode = 0
directory security mask = 0777
force directory security mode = 0


=============================================================================
Please Share Your knowledge to solve this problem...

Thank You in Advance,

Regards,
Jerrynikki.