I have a problem with sending data to server:

02:24:08.26 Sending StatCgminer data.
02:24:08.26 Getting data for StatCgminer worker.
02:24:08.26 Sending { "command": "coin", "devs": "" } to cgminer.
02:24:09.26 Error occured while sending request to cgminer.
02:24:09.26 Error occured while sending request to cgminer.
System.Net.Sockets.SocketException (0x80004005): No connection could be made bec
ause the target machine actively refused it 127.0.0.1:4028
   at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddre
ss socketAddress)
   at System.Net.Sockets.Socket.Connect(EndPoint remoteEP)
   at CgminerMonitorClient.Workers.Cgminer.CommandSender.SendMessage(String mess
age, Int32 port)
   at CgminerMonitorClient.Workers.Cgminer.CgminerWorker.GetStats(Config config)

02:24:09.27 Getting StatCgminer data failed. Sleeping for a 2s and re
trying