silverlight 调用 WCF集成的COM+组件接口时 提示：“无法模拟用户” 请问怎么解决？

服务端配置文件代码：
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <system.web>
    <compilation debug="true" />
  </system.web>
  <!-- 部署服务库项目时，必须将配置文件的内容添加到 
  主机的 app.config 文件中。System.Configuration 不支持库的配置文件。-->
  <system.serviceModel>
    <bindings>
      <wsHttpBinding>
        <binding name="comNonTransactionalBinding">
          <reliableSession enabled="true" />
 <security mode="None"/>
        </binding>
        <binding name="comTransactionalBinding" transactionFlow="true">
          <reliableSession enabled="true" />
 <security mode="None"/>
        </binding>
      </wsHttpBinding>
    </bindings>
    <comContracts>
      <comContract contract="{CA2AC0A4-0A4C-3BDE-A767-E518388312D7}"
        name="IMYCOMPLUS" namespace="http://tempuri.org/CA2AC0A4-0A4C-3BDE-A767-E518388312D7"
        requiresSession="true">
        <exposedMethods>
          <add exposedMethod="SayHello" />
        </exposedMethods>
      </comContract>
    </comContracts>
    <services>
      <service behaviorConfiguration="Wcf.Service1Behavior" name="Wcf.Service1">
        <endpoint address="" binding="basicHttpBinding" bindingConfiguration=""
          contract="Wcf.IService1">
          <identity>
            <userPrincipalName value="wylkey" />
            <servicePrincipalName value="wylkey" />
            <dns value="localhost" />
            <certificateReference findValue="wylkey" isChainIncluded="true" />
          </identity>
        </endpoint>
        <host>
          <baseAddresses>
            <add baseAddress="http://localhost:8731/Design_Time_Addresses/Wcf/Service1/" />
          </baseAddresses>
        </host>
      </service>
      <service behaviorConfiguration="ComServiceMexBehavior" name="{68ABED8C-DFC9-46DA-9072-2E4DA5C5CEF8},{0F9BC53E-D3C2-3C6F-B144-0959CAEA06C0}">
        <endpoint address="IMYCOMPLUS" binding="wsHttpBinding" bindingConfiguration="comNonTransactionalBinding"
          contract="{CA2AC0A4-0A4C-3BDE-A767-E518388312D7}" />
        <endpoint address="mex" binding="mexHttpBinding" bindingConfiguration=""
          contract="IMetadataExchange" />
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior name="Wcf.Service1Behavior">
          <serviceMetadata httpGetEnabled="true" />
          <serviceDebug includeExceptionDetailInFaults="true" />
        </behavior>
        <behavior name="ComServiceMexBehavior">
          <serviceMetadata httpGetEnabled="true" />
          <serviceDebug includeExceptionDetailInFaults="true" />
        </behavior>
      </serviceBehaviors>
    </behaviors>
  </system.serviceModel>
</configuration>  --------------------编程问答-------------------- 我就这点分了，请各位DX帮帮忙吧 --------------------编程问答--------------------

补充：.NET技术 ,  Web Services