you have this error when typing smbstatus?
CODE
Samba version 2.2.5
Service uid gid pid machine
----------------------------------------------
Failed to open byte range locking database
ERROR: Failed to initialise locking database
Can't initialise locking module - exiting
Service uid gid pid machine
----------------------------------------------
Failed to open byte range locking database
ERROR: Failed to initialise locking database
Can't initialise locking module - exiting
I was using Samba 3.x.x and had the same error, I've solved it like this :
1. get the latest samba-client [yum install samba-client]
2. smbclient -L host -U user
3. smbclient //server/share -U user
4. ls
5. quit
type again smbstatus and everything is working now
Sincerely
Robert B