The remote server returned an unexpected response: (400) Bad Request

<binding name="BasicHttpBinding_ITestService" closeTimeout="00:01:00"
          openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00"
          allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard"
          maxBufferSize="83886080" maxBufferPoolSize="83886080" maxReceivedMessageSize="83886080"
          messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered"
          useDefaultWebProxy="true">
          <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
            maxBytesPerRead="4096" maxNameTableCharCount="16384" />
          <security mode="None">
            <transport clientCredentialType="None" proxyCredentialType="None"
              realm="" />
            <message clientCredentialType="UserName" algorithmSuite="Default" />
          </security>
        </binding>

<system.diagnostics>
    <trace autoflush="false"/>
    <sources>
      <source name="System.ServiceModel" switchValue="Information, ActivityTracing" propagateActivity="true">
        <listeners>
          <add name="sdt" type="System.Diagnostics.XmlWriterTraceListener" initializeData="c:tempServiceTrace.svclog"/>
        </listeners>
      </source>
    </sources>
</system.diagnostics>