[Samba] can not access samba drive on Redhat ES 4

Hi, Our samba server is running Red Hat Enterprise Linux ES release 4 (Nahant Update 4) with samba version: samba-3.0.33-0.17.el4. We like to authenticate all the users with our Primary Domain Controller wnidows 2008. Some users keep getting asked to enter username and password. Even with

[Samba] cli_session_setup: NT1 session setup failed: NT_STATUS_LOGON_FAILURE

MY OS is: Red Hat Enterprise Linux ES release 4 (Nahant Update 8) Samba version: samba-3.0.25b-0.4E.6 I'm map a share drive and I get asked for user name and password. Right now I'm just trouble shooting the samba part. smb service is running and winbind server is running too. The