It looks like the engine id matches. Does the SNMP community and user information configured on the switch match the SNMP Device Access Profile used in NetSight?
Go to Console > Tools > Authorization/Device Access > click on Profiles/Credentials tab
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Do the Access Profile credentials (Read / Write) in NetSight you are using to communicate with the switch match the SNMP credentials configured on the switch? You can double click on a profile to view or edit the read / write credentials including passwords.