This error ‘Error 10061 ; WSAECONNREFUSED: Connection refused’ indicates that no connection could be made because the target machine actively refused it.This usually results from trying to connect to a service that is inactive on the foreign host - i.e. one with no server application running.
You could perform the following checks:
* Check whether the server you’re connected to has started and running.
* Check if you have a firewall that is blocking the port that you are trying to listen to.
Additionally, in order to get more information about this error, you could check the vdp.log file which is located under the folder "<DENODO_HOME>/logs"
Hope this helps!