OMSA and SNMPv3

We're currently migrating to SNMPv3 and disabling v2 for security purposes. I have installed OMSA and added an snmpv3 user but am unable to view disk status through using our monitoring software (PRTG). I've verified that OMSA is completely functional through the webUI. Not sure what I'm missing here and any help would be greatly appreciated. 

Running Ubuntu 10.04 and latest OMSA in the repo on NX3100. I also added the following to my /etc/snmp/snmpd.conf:

# Allow Systems Management Data Engine SNMP to connect to snmpd using SMUX
smuxpeer .1.3.6.1.4.1.674.10892.1

I have snmpv2 running just fine, btw. 

Thanks!