2008-08-25 19:46:13,408 INFO Server is running, attempting to stop it
2008-08-25 19:46:13,569 INFO Stopping Scalix server
2008-08-25 19:46:30,208 INFO Operation passed: Scalix server stopped: /opt/scalix/bin/omshut -t 2: (0) ['Disabling 14 subsystem(s).', 'omoff : [OM 4835] Subsystem Item Structure Server is already off.', 'Disabling 8 subsystem(s).']
2008-08-25 19:46:30,252 INFO ldapmapper is running, attempting to stop it
2008-08-25 19:46:30,975 INFO Starting installation of RPM files [('/root/scalix-11.4.1-U1-GA/software/scalix_server/scalix-server-11.4.1.11929-1.rhel5.i386.rpm', 'scalix-server')]
2008-08-25 19:46:35,582 ERROR Operation failed: Install /bin/rpm -U -v --percent /root/scalix-11.4.1-U1-GA/software/scalix_server/scalix-server-11.4.1.11929-1.rhel5.i386.rpm: (2) ['Preparing packages for installation...', '\tpackage scalix-server-11.4.1.11929-1.rhel5 is already installed']
2008-08-25 19:46:35,583 CRITICAL Operation failed: Installation of packages failed
Scalix server seems to be running with the old version

A new upgrade won't work same messages as above.
I seems that the scalix server is running email is handled. But spam checking and virus control with sendmail doesn't work (nothing in the maillog from sendmail)