Describe which windows client you are using. Does your network use a workgroup or a domain? Post the global and the part of smb.conf that contains the share definition. What are the permissions of the directory you are sharing?
What "security=" model are you using? The default is "security=user". If you aren't using a password server, or ADS or a samba password backend, then samba uses the smbpasswd file. This means that you want to use the smbpasswd command to enter the username and password, and to have the windows user also a Linux user.
This is unless this share is a guest share. You need to provide more information.
Also look in /usr/share/doc/samba-<version>/ for some pdf or postscript books. The "Samba 3 by Example" book is very good, and includes a number of sample configurations. It even takes you step by step in preparing the directory to be shared. If those books aren't in there, see if you have a samba-doc package you can install or download the book from the samba.org website.
Last edited by jschiwal; 02-14-2008 at 12:15 AM.