All, I am having a problem that I can not solve for the last 2 weeks. I mounted a shared drive on the Samba server, and from the XP Home machine I can view the shared folder but cannot *write *to it. I followed the samba setup instructions as given in http://ubuntuforums.org/showthread.php?t=202605&highlight=howto+windows+file+sharing+samba Through the Samba diagnostic test procedure, I encountered the following problem : root@ubuntu-samba:/etc/samba# smbclient -L localhost Password: session setup failed: NT_STATUS_LOGON_FAILURE root@ubuntu-samba:/etc/samba# For your information, I am using the latest version of Samba. I used to use an older Samba version and it works fine e.g. I can read/write to the shared folder. What would cause the NT_STATUS_LOGON_FAILURE problem ? I scanned the web for an answer and apparently there are no solutions, except that some users mentioned the latest Samba version patches is not working correctly under certain conditions. I am running out of options to fix this problem, and will appreciate any help from the community so that I can get some sleep. Thanks, Khanh