WCF REST - IIS6 的流式处理问题

>我正在尝试使用WCF REST将文件流式传输到服务器。当我在控制台上托管应用程序时，流去了文件。即，当我在循环中发送字节（读取要发送的文件）并在服务器端保留调试器时，该服务曾经在每次循环中都会受到打击。但是现在我已经在 IIS 6 上托管了该服务，只有当我关闭流时，该服务才会命中。这是某个 IIS6 问题还是我做错了什么？

以下是 web.config：

<system.web>
    <compilation debug="true" targetFramework="4.0" />
    <pages validateRequest="false" />
    <httpRuntime  maxRequestLength="102400" executionTimeout="3600" requestValidationMode="2.0" requestPathInvalidCharacters="" />
</system.web>
<system.serviceModel>
    <serviceHostingEnvironment aspNetCompatibilityEnabled="true"/>
    <bindings>
        <webHttpBinding>
            <binding name="streamWebHttpBinding" maxBufferPoolSize="2147483647" maxReceivedMessageSize="2147483647" receiveTimeout="01:00:00" sendTimeout="01:00:00" transferMode="Buffered" />
        </webHttpBinding>
    </bindings>
    <behaviors>
        <serviceBehaviors>
            <behavior name="FileUpload.FileUploadBehavior">
                <serviceMetadata httpGetEnabled="true"/>
                <serviceDebug includeExceptionDetailInFaults="true"/>
            </behavior>
        </serviceBehaviors>
        <endpointBehaviors>
            <behavior name="RestBehavior">
                <webHttp />
            </behavior>
        </endpointBehaviors>
    </behaviors>
    <services>
        <service name="FileUpload.UploadData" behaviorConfiguration="FileUpload.FileUploadBehavior" >
            <endpoint behaviorConfiguration="RestBehavior" address="" contract="FileUpload.IUpload" binding="webHttpBinding" bindingConfiguration="streamWebHttpBinding" />
        </service>
    </services>
</system.serviceModel>

请帮忙

编辑：

整理客户端代码：

HttpWebRequest req = GetWebRequest("asyncfileupload", fileName);
            // 64 KB buffer
            byte[] buf = new byte[0x10000];
            Stream st = req.GetRequestStream();
            int bytesRead;
            using (FileStream fs = new FileStream(filepath, FileMode.Open, FileAccess.Read))
            {
                bytesRead = fs.Read(buf, 0, buf.Length);
                while (bytesRead > 0)
                {
                    st.Write(buf, 0, bytesRead);
                    bytesRead = fs.Read(buf, 0, buf.Length);
                }
                st.Close();
            }

错误发生在代码"st.Write（buf， 0， bytesRead）;" 它说 - 请求已中止：请求已取消。~2 分钟后