The remote server returned an error: NotFound

 public Shareidea.Web.UI.Control.Workflow.Designer.HRS_Service.UploadFileResponse EndUploadFile(System.IAsyncResult result) {
                object[] _args = new object[0];
                Shareidea.Web.UI.Control.Workflow.Designer.HRS_Service.UploadFileResponse _result = ((Shareidea.Web.UI.Control.Workflow.Designer.HRS_Service.UploadFileResponse)(base.EndInvoke("UploadFile", _args, result)));
                return _result;//当运行到这句话是出错：
            }

The remote server returned an error: NotFound

Web.config中的配置为：

 <system.serviceModel>
    <bindings>
      <basicHttpBinding>
        <binding name="WSE_HRSSoap" closeTimeout="00:01:00" openTimeout="00:01:00"
          receiveTimeout="00:10:00" sendTimeout="00:01:00" allowCookies="false"
          bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard"
          maxBufferSize="165536" maxBufferPoolSize="1524288" maxReceivedMessageSize="165536"
          messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered"
          useDefaultWebProxy="true">
          <readerQuotas maxDepth="32" maxStringContentLength="18192" maxArrayLength="116384"
            maxBytesPerRead="14096" maxNameTableCharCount="1116384" />
          <security mode="None">
            <transport clientCredentialType="None" proxyCredentialType="None"
              realm="" />
            <message clientCredentialType="UserName" algorithmSuite="Default" />
          </security>
        </binding>
      </basicHttpBinding>
    </bindings>
    <client>
      <endpoint address="http://127.0.0.1:8088/BaService/WSE_HRS.asmx"
        binding="basicHttpBinding" bindingConfiguration="WSE_HRSSoap"
        contract="WebServiceRefer.WSE_HRSSoap" name="WSE_HRSSoap" />
    </client>
  </system.serviceModel>

在服务项目的根目录下，我已近配置上：clientaccesspolicy.xml，已经可以实现跨域的服务访问！

基于目前的这种配置情况，有时也可以运行通过，很不稳定，不知为何？？

这个问题让我很疑惑，我查资料花了一上午没能解决，希望高手指点！谢谢啦，@@！