I was trying to connect Lighstremer with Adapter for the first time in a VPS. I am getting the following errors when I start adapter. Lightstreamer is waiting for the Ports.

Could not connect to Lightstreamer Server.
Make sure Lightstreamer Server is started before this Adapter.
System.Net.Sockets.SocketException: No such host is known
at System.Net.Sockets.TcpClient..ctor(String hostname, Int32 port)
at Adapters.HomepageAuctionModule.Main()

I have given the correct hostname in all config files and in initLS.js files also.
But still getting the same. Please help me

Many Thanks