Error while Switchover to Primary Server

[mhsrinivasan]

I have built a softphone. and I have not used ProtocolManager for managing Protocols.

The two T-servers are configured for HotStandby Mode.
When there is a switchover from Primary to Standby Server, there is no issue.
However, when there is a switchover from stanby server to primary server, I am getting the following error message

:Genesyslab.Platform.Commons.Protocols.ProtocolException: Exception occured during channel openning ---> System.Net.Sockets.SocketException: No connection could be made because the target machine actively refused it 10.1.1.71:3000
  at System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult)
  at Genesyslab.Platform.Commons.Connection.CommonConnection.AsyncConnect(IAsyncResult res)
  --- End of inner exception stack trace ---
  at Genesyslab.Platform.Commons.Protocols.DuplexChannel.CompleteOpen(Object state)
  at Genesyslab.Platform.Commons.Protocols.DuplexChannel.Open()
  at SoftPhone.Application.TServerConnection.DoConnect()