Need help, we are receiving type=SYSCALL with auid=unset event entries

We are receiving LINUX RHEL versions 5 and 6 in our environment with type=SYSCALL and auid=unset event types. We are unable to properly monitor an event with AUID=unset, does anyone know why we are currently seeing these and what is the resolution? Thanks! Briane Lin IBM Global Technology Services - Americas Identity and Access Management, Automation Solutions (Email): brlin(a)us.ibm.com (Office): (720) 395-2049 "The only easy day was yesterday." - US Navy Seals -