Hi, In fact, I have changed the right of access by using "chmod" for each file, but at the end of configuration, I got the "Software error". Software error: ERROR: Need write permission in OTRS home Try: $OTRS_HOME/bin/otrs.SetPermissions.pl !!! I tryed to reconfigure the file otrs.SetPermissions.pl and run it. I got this as resultat Bash:~#perl otrs.SetPermissions.pl bin/otrs.SetPermissions.pl <1.4> - set OTRS file permissions Copyright (C) 2001-2010 OTRS AG, http://otrs.org/ Usage: otrs.SetPermissions.pl [--otrs-user=<otrs>] [--web-user=] [--otrs-group=] [--web-group=] [--admin-user=] [--admin-group=] [--admin-group-writable] [--secure] [--not-root] Try: otrs.SetPermissions.pl /opt/otrs Bash# perl otrs.SetPermissions.pl /opt/otrs bin/otrs.SetPermissions.pl <1.4> - set OTRS file permissions Copyright (C) 2001-2010 OTRS AG, http://otrs.org/ ERROR: --otrs-user= I wonder which name of user that I need to give as the value of "--otrs-user". Maybe, it happed because that I copyed the file "otrs.SetPermissions.pl" from the original installing file "otrs-3.0.6" when I have gotten this kind of problem the last time? OS: Linux version 2.6.26-1-686 (Debian 2.6.26-13) (waldi@debian.org) (gcc version 4.1.3 20080704 (prerelease) (Debian 4.1.2-24)) #1 SMP Sat Jan 10 18:29:31 UTC 2009 Apache/2.2.9 mysqladmin Ver 8.41 Distrib 5.0.51a, for debian-linux-gnu on i486 Copyright (C) 2000-2006 MySQL AB This software comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to modify and redistribute it under the GPL license Server version 5.0.51a-24 Protocol version 10 Connection Localhost via UNIX socket UNIX socket /var/run/mysqld/mysqld.sock Uptime: 33 days 20 hours 39 sec Thanks a lot for your help! Best regards! Xiaoxing Meng