A Network Management System listed as a trap receiver in the DCE Network Management System Integration display can fail to receive a test trap if there are problems with the settings used, or with the network.
If the problem persists, contact APC Support (http://www.apc.com/support).
Make sure the "SNMPv1 Trap Settings" display or "SNMPv3 Inform Settings" display settings associated with the target Network Management console are properly defined.
Make sure the SNMP settings have not changed at the target Network Management System console, and that the appropriate SNMP service is enabled at that console.
Make sure the device was not turned off or disconnected from the network when the test trap was sent.
Correct any network connection problem.