Тип содержимого application / xml; charset=utf-8 ответного сообщения не соответствует типу содержимого привязки (text / xml; charset=utf-8)

Я пытаюсь использовать веб-службу WCF с помощью автономного приложения. Я могу просмотреть эту службу с помощью Internet Explorer, а также просматривать ссылки на службы Visual studio.

Это ошибка, которую я получаю

The content type text/html; charset=UTF-8 of the response message does not match the content type of the binding (text/xml; charset=utf-8).

как изменить это, чтобы использовать правильный тип контента?

вот мой конфигурационный файл

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<startup> 
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
</startup>
<system.serviceModel>
    <bindings>
        <basicHttpBinding>
            <binding name="G2WebServiceSoap11Binding" />
        </basicHttpBinding>
        <customBinding>
            <binding name="G2WebServiceSoap12Binding">
                <textMessageEncoding messageVersion="Soap12" />
                <httpTransport />
            </binding>
        </customBinding>
    </bindings>
    <client>
        <endpoint address="http://XXX.XX.XX.XX:XX/janus/services/G2WebService.G2WebServiceHttpSoap11Endpoint/"
            binding="basicHttpBinding" bindingConfiguration="G2WebServiceSoap11Binding"
            contract="G2ServiceReference.G2WebServicePortType"
            name="G2WebServiceHttpSoap11Endpoint" />
        <endpoint address="http://XXX.XX.XX.XX:XX/janus/services/G2WebService.G2WebServiceHttpSoap12Endpoint/"
            binding="customBinding" bindingConfiguration="G2WebServiceSoap12Binding"
            contract="G2ServiceReference.G2WebServicePortType"
            name="G2WebServiceHttpSoap12Endpoint" />
    </client>
</system.serviceModel>

вот стек

{System.ServiceModel.ProtocolException: The content type application/xml;charset=utf-8 of the response message does not match the content type of the binding (text/xml; charset=utf-8). If using a custom encoder, be sure that the IsContentTypeSupported method is implemented properly. 
The first 1024 bytes of the response were: '<Exception>org.apache.axis2.AxisFault: The endpoint reference (EPR) for the Operation not found is /janus/services/G2WebService and the WSA Action = null
    at org.apache.axis2.engine.DispatchPhase.checkPostConditions(DispatchPhase.java:89)
    at org.apache.axis2.engine.Phase.invoke(Phase.java:333)
    at org.apache.axis2.engine.AxisEngine.invoke(AxisEngine.java:264)
    at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:163)
    at org.apache.axis2.transport.http.util.RESTUtil.invokeAxisEngine(RESTUtil.java:136)
    at org.apache.axis2.transport.http.util.RESTUtil.processURLRequest(RESTUtil.java:130)
    at org.apache.axis2.transport.http.AxisServlet$RestRequestProcessor.processURLRequest(AxisServlet.java:829)
    at org.apache.axis2.transport.http.AxisServlet.doGet(AxisServlet.java:255)
    at com.rm.janus.webservice.GroupCallServlet.doGet(GroupCallServlet.java:33)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
    at javax.servlet.http.HttpSer'. ---> System.Net.WebException: The remote server returned an error: (500) Internal Server Error.
   at System.Net.HttpWebRequest.GetResponse()
   at System.ServiceModel.Channels.HttpChannelFactory`1.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
   --- End of inner exception stack trace ---

Server stack trace: 
   at System.ServiceModel.Channels.HttpChannelUtilities.ValidateRequestReplyResponse(HttpWebRequest request, HttpWebResponse response, HttpChannelFactory`1 factory, WebException responseException, ChannelBinding channelBinding)
   at System.ServiceModel.Channels.HttpChannelFactory`1.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
   at System.ServiceModel.Channels.RequestChannel.Request(Message message, TimeSpan timeout)
   at System.ServiceModel.Dispatcher.RequestChannelBinder.Request(Message message, 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 InetgrisG2TestApp.G2ServiceReference.G2WebServicePortType.getStudentData(getStudentDataRequest request)
   at InetgrisG2TestApp.G2ServiceReference.G2WebServicePortTypeClient.G2TestApp.G2ServiceReference.G2WebServicePortType.getStudentData(getStudentDataRequest request) in c:UserssDocumentsVisual Studio 2012ProjectsG2TestAppInetgrisG2TestAppService ReferencesG2ServiceReferenceReference.cs:line 2981
   at InetgrisG2TestApp.G2ServiceReference.G2WebServicePortTypeClient.getStudentData(ServiceRequest serviceReq) in c:UserssDocumentsVisual Studio 2012ProjectsG2TestAppG2TestAppService ReferencesG2ServiceReferenceReference.cs:line 2987
   at InetgrisG2TestApp.Program.Main(String[] args) in c:UserssDocumentsVisual Studio 2012ProjectsG2TestAppG2TestAppProgram.cs:line 57}