[Observium] Unable to add Host

I noticed the Wowza MIB was in a recent update from SVN so I tried adding one of my hosts to our Observium server and it states: No reply on community t-public-ss using v2c. Could not reach 'HOSTNAME' with given SNMP parameters using v2c.

I have done an snmpwalk from the Observium server to the host in question and it works properly. Anybody have any idea why I can't add this host?

Thanks!