Dspack里面的例子为何不能播放mms://文件？

                            
我分别用windows   media   encoder   7.1   和9.0做编码，用windows   media   server   做mms服务，用Dspack的例子：VMRPlayWin和PlayWin，都不能播放。出现错误是：   
   Unknow   Graph   Event   ($43)   
   Unknow   Graph   Event   ($43)   
   Unknow   Graph   Event   ($43)   
   EC_PALETTE_CHANGED   -   The   video   palette   has   changed.   
   EC_VIDEO_SIZE_CHANGED   -   The   native   video   size   has   changed.   
   EC_CLOCK_CHANGED   -   The   reference   clock   has   changed.   
   Unknow   Graph   Event   ($48)   
   EC_BUFFERING_DATA   -   The   graph   is   buffering   data,   or   has   stopped   buffering   data.   
   EC_BUFFERING_DATA   -   The   graph   is   buffering   data,   or   has   stopped   buffering   data.   
   Unknow   Graph   Event   ($48)   
   EC_BUFFERING_DATA   -   The   graph   is   buffering   data,   or   has   stopped   buffering   data.   
   Unknow   Graph   Event   ($44)   
   Unknow   Graph   Event   ($46)   
   EC_BUFFERING_DATA   -   The   graph   is   buffering   data,   or   has   stopped   buffering   data.   
   EC_PAUSED   -   A   pause   request   has   completed.   
   EC_COMPLETE   -   All   data   from   a   particular   stream   has   been   rendered.   
   Unknow   Graph   Event   ($40)   
      
   请问如何解决，谢谢！