mplayer, mencoder and reflection

[gustavo halperin <ggh.develop@gmail.com>]

Hello

I wan record a video signal from the network. In order to watch it I run 
mplayer, see below:
> mplayer  mms://a420.l2147244871.c21472.e.lm.akamaistream.net/ .... 
/v0001/reflector:44871?videoid=18533

but when I try the same address with the mencoder in the next manner:
> mencoder  mms://a420.l2147244871.c21472.e.lm.akamaistream.net/ .... 
/v0001/reflector:44
871?videoid=18533 -oac copy  -ovc copy -o video.avi

Always the same problem:
Unable to open URL: 
mms://a420.l2147244871.c21472.e.lm.akamaistream.net/ .... 
/v0001/reflector:44871?videoid=18533
Cannot open file/device.

Any idea what is the problem,

Thank you

 Gustavo Halperin