更改ism文件时Silverlight Player为空

<object data="data:application/x-silverlight-2," type="application/x-silverlight-2" width="100%" height="100%" id="Object2">
<param name="source" value="SmoothStreamingBlackGlass.xap"/>
<param name="onerror" value="onSilverlightError" />
<param name="initparams"value='autoplay=False,muted=False,stretchmode=0,displaytimecode=False, playlist=<playList><playListItems><playListItem title="Big%20Buck%20Bunny" description="" mediaSource="Big%20Buck%20Bunny.ism/Manifest" adaptiveStreaming="True" thumbSource="Big%20Buck%20Bunny_Thumb.jpg" frameRate="24.0000384000614" ></playListItem></playListItems></playList>' />
<a href="http://go2.microsoft.com/fwlink/?LinkID=124807" style="text-decoration: none;"><img src="http://go2.microsoft.com/fwlink/?LinkId=108181" alt="Get Microsoft Silverlight" style="border-style: none" /></a>
</object>
<iframe style="visibility:hidden;height:0;width:0;border:0px"></iframe>

但是如果我像这样修改代码,我只会在呈现页面时得到一个空白区域,而不是电影剪辑。

<object data="data:application/x-silverlight-2," type="application/x-silverlight-2" width="100%" height="100%" id="Object2">
<param name="source" value="SmoothStreamingBlackGlass.xap"/>
<param name="onerror" value="onSilverlightError" />
<param name="initparams"value='autoplay=False,muted=False,stretchmode=0,displaytimecode=False, playlist=<playList><playListItems><playListItem title="Robotica_1080" description="" mediaSource="Robotica_1080.ism/Manifest" adaptiveStreaming="True" thumbSource="Robotica_1080_Thumb.jpg" frameRate="24.0000384000614" ></playListItem></playListItems></playList>' />
<a href="http://go2.microsoft.com/fwlink/?LinkID=124807" style="text-decoration: none;"><img src="http://go2.microsoft.com/fwlink/?LinkId=108181" alt="Get Microsoft Silverlight" style="border-style: none" /></a>
</object>
<iframe style="visibility:hidden;height:0;width:0;border:0px"></iframe>

有什么想法吗?我使用编码器3做编码设置在微软平滑流720p与所有默认设置。