WCF自定义绑定-服务不支持内容类型

我在我的客户机和服务器web.config文件中定义了一个自定义绑定,但是当我尝试连接时出现了这个错误,

内容类型应用/xml;服务不支持字符集=utf-8 http://localhost/contentservice.svc/PairService

服务器:

  <system.serviceModel>
  <client>
    <endpoint binding="customBinding"  bindingConfiguration="BinaryBinding" contract="Me.IContentService" name="ContentStagingEndpoint" />
  </client>
  <bindings>
    <customBinding>
      <binding name="BinaryBinding">
        <binaryMessageEncoding/>
        <httpTransport/>
      </binding>
    </customBinding>
  </bindings>
  </system.serviceModel>

<system.serviceModel>
  <behaviors>
    <serviceBehaviors>
      <behavior name="ContentService">
        <serviceMetadata httpGetEnabled="true"/>
        <serviceDebug includeExceptionDetailInFaults="true"/>
      </behavior>
    </serviceBehaviors>
  </behaviors>
  <services>
    <service behaviorConfiguration="ContentService" name="Me.ContentService">
      <endpoint address="" binding="customBinding"  bindingConfiguration="BinaryBinding" contract="Contracts.IContentService">
        <identity>
          <dns value="localhost"/>
        </identity>
      </endpoint>
      <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
    </service>
  </services>
  <bindings>
    <customBinding>
      <binding name="BinaryBinding">
        <binaryMessageEncoding/>
        <httpTransport/>
      </binding>
    </customBinding>
  </bindings>
</system.serviceModel>

下面是启动调用的代码:

var chan = New WebChannelFactory(Of IContentService)(New Uri("http://localhost/contentservice.svc")).CreateChannel();

chan.PairService();