I am creating a connection to salesforce from Delphi. I am able to login to salesforce and get issue details.
After this I created a windows service to do the same process. By using windows service,I am able to login to salesforce. But I am not query any objects. I get the exception "ESOAPHTTPException with message - A connection with the server could not be established"

  RIO := THTTPRIO.Create(nil);
  xConnection := getSOAP(false, '', RIO);
  lr := xConnection.login('Username', 'pwd');
  RIO.Service    := lr.sessionId;
  RIO.URL        := lr.serverUrl;
  sh := SessionHeader.Create;
  sh.sessionId := lr.sessionId;
  (RIO as ISOAPHeaders).Send(sh); 
    qr := xConnection.query('Select id,Name,LastName from User');

At this place I get the exception.
Please suggest how to proceed.

I am creating a connection to salesforce from Delphi. I am able to login to salesforce and get issue details.
After this I created a windows service to do the same process. By using windows service,I am able to login to salesforce. But I am not query any objects. I get the exception "ESOAPHTTPException with message - A connection with the server could not be established"

  RIO := THTTPRIO.Create(nil);
  xConnection := getSOAP(false, '', RIO);
  lr := xConnection.login('Username', 'pwd');
  RIO.Service    := lr.sessionId;
  RIO.URL        := lr.serverUrl;
  sh := SessionHeader.Create;
  sh.sessionId := lr.sessionId;
  (RIO as ISOAPHeaders).Send(sh); 
    qr := xConnection.query('Select id,Name,LastName from User');

At this place I get the exception.
Please suggest how to proceed.