samba w/ ldap backend problem

[fruitvendor]

Hello Guys,
I know this is an old issue, but after searching for days I never got any solution,

I always get this errors every time I try the net groupmap list command


[root@dc1 ~]# service ldap start
Checking configuration files for slapd: config file testing succeeded
[ OK ]
Starting slapd: [ OK ]
[root@dc1 ~]# service smb start
Starting SMB services: [ OK ]
Starting NMB services: [ OK ]
[root@dc1 ~]# smbldap-populate
Populating LDAP directory for domain testnet (S-1-5-21-3134338896-4002842771-617224089)
(using builtin directory structure)

adding new entry: dc=testnet
adding new entry: ou=People,dc=testnet
adding new entry: ou=Group,dc=testnet
adding new entry: ou=Computers,dc=testnet
adding new entry: ou=Idmap,dc=testnet
adding new entry: uid=root,ou=People,dc=testnet
adding new entry: uid=nobody,ou=People,dc=testnet
adding new entry: cn=Domain Admins,ou=Group,dc=testnet
adding new entry: cn=Domain Users,ou=Group,dc=testnet
adding new entry: cn=Domain Guests,ou=Group,dc=testnet
adding new entry: cn=Domain Computers,ou=Group,dc=testnet
adding new entry: cn=Administrators,ou=Group,dc=testnet
adding new entry: cn=Account Operators,ou=Group,dc=testnet
adding new entry: cn=Print Operators,ou=Group,dc=testnet
adding new entry: cn=Backup Operators,ou=Group,dc=testnet
adding new entry: cn=Replicators,ou=Group,dc=testnet
adding new entry: sambaDomainName=testnet,dc=testnet

Please provide a password for the domain root:
Changing UNIX and samba passwords for root
New password:
Retype new password:
[root@dc1 ~]# net groupmap list
[2011/06/22 11:17:19, 0] passdb/pdb_ldap.c:ldapsam_setsamgrent(3107)
ldapsam_setsamgrent: LDAP search failed: No such object
[2011/06/22 11:17:19, 0] passdb/pdb_ldap.c:ldapsam_enum_group_mapping(3179)
ldapsam_enum_group_mapping: Unable to open passdb


I hope someone would help,

[fruitvendor]

any hints or possible solutions