I got the same problem
running centos 4.4 and scalix 11 rc2
I havn't run apache2 on it before so it got installed with it, same with tomcat.
it seems to start up ok:
Dec 17 01:29:46 hostbox startup.sh: Using CATALINA_BASE: /var/opt/scalix/hx/tomcat
Dec 17 01:29:46 hostbox startup.sh: Using CATALINA_HOME: /opt/scalix-tomcat
Dec 17 01:29:46 hostbox startup.sh: Using CATALINA_TMPDIR: /var/opt/scalix/hx/tomcat/temp
Dec 17 01:29:46 hostbox startup.sh: Using JRE_HOME:
Dec 17 01:29:46 hostbox scalix-tomcat: Starting Tomcat service: succeeded
from /var/opt/scalix/hx/tomcat/logs/catalina.out:
Dec 17, 2006 1:29:48 AM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 945 ms
Dec 17, 2006 1:29:48 AM org.apache.catalina.core.StandardService start
INFO: Starting service Catalina
Dec 17, 2006 1:29:48 AM org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/5.5.16
Dec 17, 2006 1:29:48 AM org.apache.catalina.core.StandardHost start
INFO: XML validation disabled
RES: Initializing log4j using file /var/opt/scalix/hx/res/config/log4j.properties
log4j:WARN No appenders could be found for logger (org.hibernate.proxy.BasicLazyInitializer).
log4j:WARN Please initialize the log4j system properly.
Dec 17, 2006 1:29:55 AM org.apache.catalina.core.ApplicationContext log
INFO: initializing Scalix Web Access
reading configuration @ /var/opt/scalix/hx/webmail/swa.properties
Dec 17, 2006 1:29:55 AM org.apache.catalina.core.ApplicationContext log
INFO: done initializing Scalix Web Access
Dec 17, 2006 1:29:56 AM org.apache.catalina.loader.WebappClassLoader validateJarFile
INFO: validateJarFile(/var/opt/scalix/hx/tomcat/webapps/caa/WEB-INF/lib/j2ee.jar) - jar not loaded. See Se
rvlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class
CAA: scalix.instance is /var/opt/scalix/hx
CAA: caa-root-directory is /var/opt/scalix/hx/caa/
CAA: Loaded web.xml init params
CAA: caa-config-directory is /var/opt/scalix/hx/caa/config
CAA: log4j-init-file is /var/opt/scalix/hx/caa/config/log4j.properties