FMS 3.5 Application Instance Help!

I am using AS3 netconnection and netstream classes to stream video on FMS 3.5.  When specifying the URL with a nested application instance in the netconnection, it does not work.  For example:

This does not work:
ncConnection.connect(rtmp://videos.mysite.com/vod/ms/videos/54);

Does work:
ncConnection.connect(rtmp://videos.mysite.com/vod/ms);

The videos only play if they are in the root.  Is there a setting I am not setting correctly?

However, the videos play fine if I use the FLVPlayback component and call the video directly in the nested directory structure:

rtmp://videos.mysite.com/vod/ms/videos/54/myVideo.flv

Please advise if you know why this is happening and if there is a solution.


TIA,

Terry