Problem with Indexer Discovery: Receiving "ERROR IndexerDiscoveryHeartbeatThread - failed heartbeart" when attempting to add a new forwarder

Hi, We have index clustering working fine. We have several heavy forwarders configured successfully with indexer discovery. However, when I go to add another new forwarder, I get the issue below. My steps are to add the clear text pass phrase in the outputs.conf of the forwarder. Then I restart the forwarder. From there Splunk encrypts to what is below (pass4SymmKey). Is this the correct way to add discovery to a forwarder? [tcpout:default-autolb-group] indexerDiscovery = cluster useACK = true [indexer_discovery:cluster] master_uri = https://cluster_master:8089 pass4SymmKey = $1$19GA9JbHEqO/13Z8+c4/2Q== 10-04-2016 13:16:50.955 -0400 ERROR IndexerDiscoveryHeartbeatThread - failed heartbeat for group=default-autolb-group uri=https://cluster_master:8089/services/indexer_discovery http_response=Unauthorized 10-04-2016 13:16:52.066 -0400 WARN TcpOutputProc - Forwarding to indexer group default-autolb-group blocked for 810 seconds.