Missing '/usr/local/nagios/libexec/eventhandlers/submit_chec


Hi all
After configuring my Nagios server with SNMPTT to track SNMP Traps I now realised that I miss the folder '/usr/local/nagios/libexec/eventhandlers/ and as a result cannot write \ read to submit_check_result.
Apperently (and I didn’t know this until today) our Nagios is pretty old (where can I find the Nagios version? )

What shall I do in order to get the above path and file?