what am i doing wrong with this silverlight ISM video?

[klatwork]

so i'm trying to download this olympic video...
doesn't seem to have encryption....
http://olympics.cbc.ca/videos/live/v...rning-day.html

I found the manifest:
http://vod-s.olympics.cbc.ca/d8dbb15...0 183081c2951

and i run ismdownloder using this command:
ismdownloader "http://vod-s.olympics.cbc.ca/d8dbb15f-8826-4a1b-9453-257473c521a7/53739a54-0f5e-49ec-afea-04b2eac3ae43.ism/manifest?__auth__=1392341182_da26db86241f8eb136e50 183081c2951" "c:\temp\video.mkv"


somehow, it says the highest 250000 bitrate video is selected as well as the audio, but i checked the folders, only the audio segments are downloaded, the video segment folder is empty...somehow it just doesn't download the video stream...

so i tried editing the manifest...and deleted video bitrate streams 1-7..and only keep the first stream "0" ....it downloads fine...
and that's the only stream/bitrate that downloads ..it doesn't download the rest of the bitrates

I'm lost..PLEASE help...experts..