host wcf service in my web site

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WCF

hi.
I wrote a test public chat service with WCF
I have tested the service in IIS and it worked correctly. But when I upload it to my web site on internet, the service does not work.

my service Web.Config:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  
  <system.web>
    <compilation debug="true" targetFramework="4.0" />
    <customErrors mode="Off"/>
  </system.web>
  <system.serviceModel>
    <serviceHostingEnvironment multipleSiteBindingsEnabled="True">
    </serviceHostingEnvironment>
    <bindings >
      <wsDualHttpBinding>
        <binding name="wsDualHttp">
          <security mode="None">
            <message  clientCredentialType="None" algorithmSuite="Default" />
          </security>
        </binding>       
     </wsDualHttpBinding>
    </bindings>
    <protocolMapping>
      <add scheme="http" binding="wsDualHttpBinding" bindingConfiguration="wsDualHttp" />
    </protocolMapping>
    <services>
      <service behaviorConfiguration="ChatServiceBehavior" name="ServerChat.ChatService">
        <endpoint name="wsDualHttpBinding_ISendChatService" binding="wsDualHttpBinding" bindingConfiguration="wsDualHttp"
          contract="ServerChat.ISendChatService">
        </endpoint>
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior name="ChatServiceBehavior">
          <serviceMetadata httpGetEnabled="True"/>
          <serviceDebug includeExceptionDetailInFaults="False"/>
          <useRequestHeadersForMetadataAddress />
          <dataContractSerializer />
        </behavior>
      </serviceBehaviors>
    </behaviors>
  </system.serviceModel>
  <system.webServer>
    <modules runAllManagedModulesForAllRequests="true"/>
    <directoryBrowse enabled="true"/>
  </system.webServer>
</configuration>

my client is windows application
clinet app.Config:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <system.serviceModel>
        <bindings>
            <wsDualHttpBinding>
                <binding name="wsDualHttpBinding_ISendChatService" sendTimeout ="00:00:15">
                    <security mode="None" />
                </binding>
            </wsDualHttpBinding>
        </bindings>
    <behaviors>
      <serviceBehaviors>
        <behavior name="ChatServiceBehavior">
          <serviceMetadata httpGetEnabled="True"/>
          <serviceDebug includeExceptionDetailInFaults="False"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
        <client>
            <endpoint address="http://MySite.com/ChatService.svc"
                binding="wsDualHttpBinding" bindingConfiguration="wsDualHttpBinding_ISendChatService"
                contract="ChatServerService.ISendChatService" name="wsDualHttpBinding_ISendChatService">
                <identity>
                    <dns value="http://MySite.com" />
                </identity>
            </endpoint>
        </client>
    </system.serviceModel>
</configuration>

and windows firewall is Off!!

Exception:

An unhandled exception of type 'System.TimeoutException' occurred in mscorlib.dll

Additional information: The open operation did not complete within the allotted timeout of 00:00:14.9969956. The time allotted to this operation may have been a portion of a longer timeout.

StackTrace:


Server stack trace:
at System.ServiceModel.Channels.ReliableRequestor.ThrowTimeoutException()
at System.ServiceModel.Channels.ReliableRequestor.Request(TimeSpan timeout)
at System.ServiceModel.Channels.ClientReliableSession.Open(TimeSpan timeout)
at System.ServiceModel.Channels.ClientReliableDuplexSessionChannel.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.CallOpenOnce.System.ServiceModel.Channels.ServiceChannel.ICallOnce.Call(ServiceChannel channel, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.CallOnceManager.CallOnce(TimeSpan timeout, CallOnceManager cascade)
at System.ServiceModel.Channels.ServiceChannel.EnsureOpened(TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

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 ClientChat.ChatServerService.ISendChatService.Start(String Name)
at ClientChat.ChatServerService.SendChatServiceClient.Start(String Name) in d:\Project\My\Test\ClientChat\ClientChat\Service References\ChatServerService\Reference.cs:line 71
at ClientChat.ReceiveClient.Start(ReceiveClient rc, String name) in d:\Project\My\Test\ClientChat\ClientChat\ReceiveClient.cs:line 25
at ClientChat.Form1.btnLogin_Click(Object sender, EventArgs e) in d:\Project\My\Test\ClientChat\ClientChat\Form1.cs:line 50
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(Form mainForm)
at ClientChat.Program.Main() in d:\Project\My\Test\ClientChat\ClientChat\Program.cs:line 18
at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()

Please Help me!! :(