Can not trigg on SNMP trap despite listener configuration

I configured trap listener with a Enterprise specific trap. (see trapListenerCfg.jpg attachment)

When I send this trap to the the ApplicationsManager, I can see it in the "Unsolicited Traps" window. I never see it in the "Configured Traps". The action associated to this trap is not executed.

However I thought I properly configured the SNMP Trap Listener details. (see unsolicitedTrap.jpg attachment)

How does one do to have ApplicationsManager capture traps as configured in the TRAP Listener window?

Does one need to have a mib somewhere in a specific directory for this trap?

Is it mandatory to use the MIB browser to chose the Enterprise OID?

Thanks for your help \Yvan