You need to use the aix auditing system to enable auditing those events. (audit start or audit on)
The configuration is in /etc/security/audit
look in the config file.
You will need to use stream mode and then add
the appropriate stream commands in the audit stream file
and configure the appropriate events.
We output our audits to syslog by poping the output of
auditstream | auditpr -v | perllogger.pl
You will need to also add something to your startup routines.
email if you need more information..