help for snmp message

alert BIGIP_CUSTOM_GUI_LOGIN_FAILED "httpd\(pam_audit\): User=(.*) tty=(.*) host=(.*) failed to login after (.*) attempts" {
snmptrap OID=".1.3.6.1.4.1.3375.2.4.0.300";
email toaddress="toaddress@mydomain.com"
fromaddress="fromaddress@mydomain.com"
body="This is a custom alert OID .1.3.6.1.4.1.3375.2.4.0.300"

This is the custom snmp that i am using in for track failed login i want to give exception for root user can some one help me for the same