Disable "Use SNMP Agent" checkbox to change SNMP agent parameters
SNMP standard port 161 can't be used by "Task" agent because it is already used by "Device" agent.
Each notification contains also a variable binding to "channelName" in the MIB. This name corresponds to the task name which is customizable in the GUI.
Heartbeat messages are never sent as INFORM, because they don't need to be acknowledged, whatever the state of the "INFORM" checkboxes in the table.