Connectivity between Vertica Cluster and Webhcat

I am trying to sync Hive tables to Vertica using WebHcatalog Connector. WebHcat is installed and running,
but when I am tring to test the connection between database cluster and WebHcat using
"$ curl http://hcathost:50111/templeton/v1/status?user.name=hive;";
an error is coming:
"curl: (7) couldn't connect to host"
Please help me through this specifying what may be the problems and what are the possible solutions.