Silverlight 调用WCF服务出错，是否是Silverlight Bug

我建了WCF服务，WCF服务Web.Config配置如下：

<system.serviceModel>
    <behaviors>
      <serviceBehaviors>
        <behavior name="FileUpLoad.Service.serviceBehaviors">
          <serviceMetadata httpGetEnabled="true"/>
          <serviceDebug includeExceptionDetailInFaults="false"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
    <services>
      <service  behaviorConfiguration="FileUpLoad.Service.serviceBehaviors" name="FileUpLoad.Service.UpLoadService">
        <endpoint address="" bindingConfiguration="LargeBuffer" binding="basicHttpBinding" contract="SLAPP.Service.IUpLoadService"/>
      </service>
    </services>
    <bindings>
      <basicHttpBinding>
        <binding name="LargeBuffer" maxBufferSize="2147483647" maxReceivedMessageSize="2147483647">
          <readerQuotas maxStringContentLength="2147483647" maxArrayLength="2147483647"/>
          <security mode="None"></security>
        </binding>
      </basicHttpBinding>
    </bindings>
  </system.serviceModel>

 

上面红色部分，不配置，引用服务正常。配置后引用出现如下错误：

在网上找了好久也没找到解决方法。希望大家给些解决方法。