WS problem:Unable to connect to the remote server

Question

WS problem:Unable to connect to the remote server

I have an application which communicates with WebServcie when.I installed the application and the WS on a srever of test,i've got all the results i'm waiting for.But when I installed the Web site and the WS on the WEBFARM, the Web site did no longer communicate with the WS. The site can communicate with the WS installed on the server of test.And another site installed on a site different from the WEBFARM can communicate with the WS installed on the WEBFARM. The problem is that the Web site installed in WEBFARM cannot communicates with the WS installed on the same WEBFARM. What to do! Here is a snapshot of the debugging window showing the emerged errors: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Stack Trace: [SocketException (0x274c): A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond] System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress) +1002066 System.Net.Sockets.Socket.InternalConnect(EndPoint remoteEP) +33 System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Int32 timeout, Exception& exception) +431 [WebException: Unable to connect to the remote server] System.Net.HttpWebRequest.GetRequestStream() +1504445 System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) +103 PTF2_EVALTA.InfoAgent.test(String chaine) in d:\BuildAreas\mk_build\PTF2_EVALTA\V0.013\PROJECTS\PTF2_EVALTA\Web References\PTF2_EIDS_WebService\Reference.cs:90 PTF2_EVALTA.WebForm1.Page_Load(Object sender, EventArgs e) in d:\BuildAreas\mk_build\PTF2_EVALTA\V0.013\PROJECTS\PTF2_EVALTA\PTF2_EVALTA_APP\WebForm1.aspx.cs:34 System.Web.UI.Control.OnLoad(EventArgs e) +99 System.Web.UI.Control.LoadRecursive() +47 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1061