WCF: The underlying connection was closed: The connection was closed unexpectedly

[tesicg]

1) Server:

Service interface:

[OperationContract(Action = Service.RequestAction, ReplyAction = Service.ReplyAction)]
Message DoWork(Message name); 

Implementation:

public class Service : IService
{
    public const string ReplyAction = "http://localhost/Service/Message_ReplyAction";
    public const string RequestAction = "http://localhost/Service/Message_RequestAction";

    public Message DoWork(Message requestXml)
    {
        using (StreamWriter writer = File.CreateText(@"E:\Projekti\WCF\WcfTestIIS\Service\Body.xml"))
        {
            writer.WriteLine(requestXml.ToString());
        }
        Message response = Message.CreateMessage(MessageVersion.Default, ReplyAction, requestXml.ToString());

        return response;
    }
} 

web.config:

<system.serviceModel>
    <serviceHostingEnvironment>
      <baseAddressPrefixFilters>
        <add prefix="http://localhost:80/"/>
      </baseAddressPrefixFilters>
    </serviceHostingEnvironment>
    <behaviors>
        <serviceBehaviors>
            <behavior name="Service.ServiceBehavior">
                <serviceMetadata httpGetEnabled="true" httpGetUrl="http://localhost/Service/Service.svc" />
                <serviceDebug includeExceptionDetailInFaults="true" />
                <MyInspector />
            </behavior>
        </serviceBehaviors>
    </behaviors>
    <services>
        <service behaviorConfiguration="Service.ServiceBehavior" name="Service.Service">
            <endpoint 
                address="http://localhost/Service/Service.svc" 
                binding="basicHttpBinding" 
                contract="Service.IService">
                <identity>
                    <dns value="localhost" />
                </identity>
            </endpoint>
            <endpoint address="mex" binding="mexHttpsBinding" contract="IMetadataExchange" />
        </service>
    </services>
    <extensions>
      <behaviorExtensions>
        <add name="MyInspector" type="Service.MessageInspectorExtension, Service, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"/>
      </behaviorExtensions>
    </extensions>
</system.serviceModel> 

2) Client:

ServiceClient client = new ServiceClient();
string RequestAction = "http://localhost/Service/Message_RequestAction";
MessageVersion msgVersion = MessageVersion.CreateVersion(EnvelopeVersion.Soap11, AddressingVersion.None);
Message request = Message.CreateMessage(msgVersion, RequestAction, "Test message");
Message reply = client.DoWork(request);
client.Close(); 

web.config:

<system.serviceModel>
    <bindings>
        <basicHttpBinding>
            <binding name="BasicHttpBinding_IService" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" allowCookies="false"
             bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" maxBufferSize="2147483647" maxBufferPoolSize="2147483647" maxReceivedMessageSize="2147483647"
             messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered" useDefaultWebProxy="true">
                <readerQuotas maxDepth="32" maxStringContentLength="2147483647" maxArrayLength="2147483647" maxBytesPerRead="2147483647" maxNameTableCharCount="2147483647"/>
                <security mode="None">
                    <transport clientCredentialType="None" proxyCredentialType="None" realm=""/>
                    <message clientCredentialType="UserName" algorithmSuite="Default"/>
                </security>
            </binding>
        </basicHttpBinding>
    </bindings>
    <client>
        <endpoint name="BasicHttpBinding_IService"
                        address="http://localhost/Service/Service.svc" 
                        binding="basicHttpBinding" 
                        bindingConfiguration="BasicHttpBinding_IService" 
                        contract="ServiceReference.IService" />
    </client>
</system.serviceModel> 

As you can see I use basicHttpBinding on server side that uses Soap 1.1. That's why I've used the code above on client side to explicitly set Soap 1.1 as well (I'm not sure if that is right way).

I'm not sure why I'm getting the error:

"The underlying connection was closed: The connection was closed unexpectedly"

and how to get rid of it.

I appreciate any help.