SNMPv3 Polling Stops Working

SNMPv3 Polling Stops Working

I am in the process of setting up OpManager.  At first it was going fine and everything was working.  After a day or two of monitoring, OpManager will no longer correctly use SNMPv3 credentials.
 
-The same credentials and devices were working properly initially
-Run snmpget from same computer using same snmp credentials and works fine
-Add SNMPv2c and SNMPv1 credentials to network devices and OpManager works fine
-Delete credentials and devices, then add all back and still not working
-Tried RepairDB
-Has latest service pack
 
Any help would be great

                  New to ADSelfService Plus?