public Class1 GetTest(string Date1)
		{
			var result =new Class1();
			try
			{
				DateTime dmoment = Convert.ToDateTime(Date1);
				using (var client = new InternalTestService.TestServiceClient(ENDPOINT_CONFIGURATION_NAME))
				{
					var resultInernal = client.GetInternalTest(username, password, dmoment);  //Это вызов метода сервиса и тут получаем исключение!
					...
				}
			}
			catch (Exception ex)
			{
				result.InitError(ex);
				Log.Error(ex);
			}
			return result;
		}

<?xml version="1.0"?>
<configuration>
	<!--Value определяет какой EndPoint использовать для связи с внутренним сервисом-->
	<system.web>
		<compilation debug="true" targetFramework="4.0" />
	</system.web>
	<system.serviceModel>

		<services>
			<service name="mySpaceName.TestServiceClient" behaviorConfiguration="ServiceBehaviour">
				<!-- Service Endpoints -->
				<endpoint address=""  binding="webHttpBinding" contract="mySpaceName.ITestServiceClient" behaviorConfiguration="web">
				</endpoint>
			</service>
		</services>

		<behaviors>
			<serviceBehaviors>
				<behavior name="ServiceBehaviour">
					<!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
					<serviceMetadata httpGetEnabled="true"/>

					<!-- To receive exception details in faults for debugging purposes, set the value below to true. Set to false before deployment to avoid disclosing exception information -->
					<serviceDebug includeExceptionDetailInFaults="false"/>
				</behavior>
			</serviceBehaviors>
			<endpointBehaviors>
				<behavior name="web">
					<webHttp/>
				</behavior>
			</endpointBehaviors>
		</behaviors>

		<bindings>

		<netTcpBinding>
			<binding name="NetTcpBinding_Service" closeTimeout="00:10:00"
				openTimeout="00:10:00" receiveTimeout="00:10:00" sendTimeout="00:10:00"
				transactionFlow="false" transferMode="Buffered" transactionProtocol="OleTransactions"
				hostNameComparisonMode="StrongWildcard" listenBacklog="10" maxBufferPoolSize="524288"
				maxBufferSize="6553600" maxConnections="10" maxReceivedMessageSize="4194304">
				<readerQuotas maxDepth="32" maxStringContentLength="9830400"
					maxArrayLength="19660800" maxBytesPerRead="4096" maxNameTableCharCount="16384" />
				<reliableSession ordered="true" inactivityTimeout="00:10:00"
					enabled="false" />
				<security mode="None">
					<transport clientCredentialType="Windows" protectionLevel="EncryptAndSign" />
					<message clientCredentialType="Windows" />
				</security>
			</binding>
		</netTcpBinding>
  </bindings>
		<client>
				<!--NetTcp endpoint-->
				<endpoint address="net.tcp://localhost:49588/TestService/TestService.svc"
				binding="netTcpBinding" bindingConfiguration="NetTcpBinding_Service"  contract="InternalTestService.ITestService" name="NetTcpBinding_Service" />
		</client>
		<serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
	</system.serviceModel>
	<system.webServer>
		<modules runAllManagedModulesForAllRequests="true"/>
	</system.webServer>
</configuration>

<?xml version="1.0"?>
<configuration>
	<system.web>
		<compilation debug="true" targetFramework="4.0" />
	</system.web>
  <system.serviceModel>
    <behaviors>
      <serviceBehaviors>
        <behavior>
          <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
          <serviceMetadata httpGetEnabled="true"/>
          <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
          <serviceDebug includeExceptionDetailInFaults="false"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>

	  <bindings>
		  <netTcpBinding>
			  <binding name="TCPB" portSharingEnabled="true" openTimeout="00:10:00"
                 closeTimeout="00:10:00"
                 sendTimeout="00:10:00"
                 receiveTimeout="00:10:00">
				  <readerQuotas maxDepth="32" maxStringContentLength="409600" maxArrayLength="819200" maxBytesPerRead="4096" maxNameTableCharCount="16384" />
				  <security mode="None">
					  <transport clientCredentialType="Windows"/>
					  <message clientCredentialType="Windows"/>
				  </security>
			  </binding>
		  </netTcpBinding>
	  </bindings>

	  <services>
		  <service name="mySpaceName.ITestService">
			  <endpoint address="wsitem" binding="ws2007HttpBinding" contract="mySpaceName.ITestService" bindingConfiguration="ws2007"/>
			  <endpoint address="wsitem" binding="netTcpBinding" contract="mySpaceName.ITestService" bindingConfiguration="TCPB"/>
		  </service>
	  </services>

    <serviceHostingEnvironment  multipleSiteBindingsEnabled="true" />
  </system.serviceModel>

  <system.webServer>
    <modules runAllManagedModulesForAllRequests="true"/>
  </system.webServer>
</configuration>

		private void button1_Click(object sender, EventArgs e)
		{
			
			//Тут через Http все прекрасно работает
			//var binding = new BasicHttpBinding();
			//var endpoint_ = new EndpointAddress("http://localhost:8011/NetTcp_TestService/TestService.svc");
			//var factoryWrapper = new FactoryWrapper<ServiceReference1.ITestService>(binding, endpoint_);


			//Пробуем через NetTcp
			var NetTcpbinding = new NetTcpBinding();
			var endpoint_NetTcp = new EndpointAddress("net.tcp://localhost:8014/NetTcp_TestService/TestService.svc/tcpTest");
//так тоже пробовал - EndpointAddress("net.tcp://localhost:8014/NetTcp_TestService/TestService.svc");

			var factoryWrapper = new FactoryWrapper<ServiceReference1.ITestService>(NetTcpbinding, endpoint_NetTcp);
			// ...
			var result = factoryWrapper.Execute(proxy => proxy.TestMethod(...));
		}