Hi,
Thumbs up to the above advice.
You need to upgrade to the latest version i.e. SEP 12.1 RU2
Upgrade process from SEP 12.1 RU1 MP1 to SEP 12.1 RU2
https://www-secure.symantec.com/connect/articles/upgrade-process-sep-121-ru1-mp1-sep-121-ru2
& if issue is with SEP 12.1 RU2 then need to log a case with Support.
How to create a new case in MySupport
http://www.symantec.com/docs/TECH58873
How to Create and Validate a SymAccount for using Symantec's MySupport
http://www.symantec.com/docs/HOWTO31127
How to update a support case and upload diagnostic files with MySupport
http://www.symantec.com/docs/TECH71023