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When I try to log in, I get an error message saying The underlying connection was closed

 Source:  - Unable to connect to the remote server

Server stack trace:
  at System.Net.HttpWebRequest.GetRequestStream(TransportContext& context)
  at System.Net.HttpWebRequest.GetRequestStream()
  at System.Runtime.Remoting.Channels.Http.HttpClientTransportSink.ProcessAndSend(IMessage msg, ITransportHeaders headers, 
Stream inputStream)
  at System.Runtime.Remoting.Channels.Http.HttpClientTransportSink.ProcessMessage(IMessage msg, ITransportHeaders requestHeaders, 
Stream requestStream, ITransportHeaders& responseHeaders, Stream& responseStream)
  at Toub.Remoting.SecureClientChannelSink.ObtainSharedKey(IMessage msg)
  at Toub.Remoting.SecureClientChannelSink.EnsureIDAndProvider(IMessage msg, ITransportHeaders requestHeaders)
  at Toub.Remoting.SecureClientChannelSink.ProcessEncryptedMessage(IMessage msg, ITransportHeaders requestHeaders, Stream 
requestStream, ITransportHeaders& responseHeaders, Stream& responseStream)
  at Toub.Remoting.SecureClientChannelSink.ProcessMessage(IMessage msg, ITransportHeaders requestHeaders, Stream requestStream, 
ITransportHeaders& responseHeaders, Stream& responseStream)
  at System.Runtime.Remoting.Channels.BinaryClientFormatterSink.SyncProcessMessage(IMessage msg)

Exception rethrown at [0]:
  at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
  at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
  at jVersionCheck.jVersionControl.jVersionCheck.get_VersionObject()
  at Client.frmLogin.VersionIsOK()
  at Client.frmLogin.cmdLogin_Click(Object sender, EventArgs e)
Could not connect to the CAREWare server @ localhost

Usually this is caused because the business tier service is not running.

Here are instructions for starting, stopping, and restarting the business tier service.

Here are instructions for starting, stopping, and restarting the database instance service.

If the business tier service is running and the database service is not running:

1. Stop the business tier service in the CW Admin utility.
2. Start the database instance.
3. Start the business tier service again.
   

Also, verify the connection between the client tier and business tier is working by:

1. Checking the port number in use is open using Telnet by following the instructions here. The default port number for CAREWare is 8124. This number can be changed and you should check the server list in order determine the current port number in use.
2. Verifying the server name is correct in the client tier settings by following the instructions here.
   

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