Hi, I have a samba server which authenticate windows 2000 server ADS. I am getting following message from the message log file. Could someone please explain me why this is happening and what is the best ways fix this?. [root@mail ~]# tail /var/log/messages Oct 31 17:25:04 mail smbd[9293]: [2006/10/31 17:25:04, 0] printing/print_cups.c:cups_cache_reload(85) Oct 31 17:25:04 mail smbd[9293]: Unable to connect to CUPS server localhost - Connection refused Oct 31 17:25:13 mail smbd[9261]: [2006/10/31 17:25:13, 0] printing/print_cups.c:cups_cache_reload(85) Oct 31 17:25:13 mail smbd[9261]: Unable to connect to CUPS server localhost - Connection refused Oct 31 17:25:13 mail smbd[9261]: [2006/10/31 17:25:13, 0] printing/print_cups.c:cups_cache_reload(85) Oct 31 17:25:13 mail smbd[9261]: Unable to connect to CUPS server localhost - Connection refused Oct 31 17:25:45 mail winbindd[6260]: [2006/10/31 17:25:45, 0] lib/util_sid.c:string_to_sid(285) Oct 31 17:25:45 mail winbindd[6260]: string_to_sid: Sid S-0-0 is not in a valid format. Oct 31 17:25:45 mail winbindd[6260]: [2006/10/31 17:25:45, 0] lib/util_sid.c:string_to_sid(285) Oct 31 17:25:45 mail winbindd[6260]: string_to_sid: Sid S-0-0 is not in a valid format. Thanks Rajeev