can't get mplayer to decode and play mms drm protected stream on the fly

[any ANONYMOUS forum user]

Hello,
I can't get mplayer to decode and play mms drm protected stream on the fly:

MPlayer-p4-svn-25803>mplayer -demuxer lavf -lavfdopts
cryptokey=xxxxxxxxxxxxxxxxxxxxx mmshttp://stream.onet.pl/tvn24_video -v -v

While it has no problem decoding same same stream dumped into a file:

MPlayer-p4-svn-25803>mplayer -demuxer lavf -lavfdopts
cryptokey=xxxxxxxxxxxxxxxxxxxxx tvn.wmv -v -v
(same cryptokey-hex is used)

Any ideas?

[Log]

MPlayer Sherpya-SVN-r25803-4.2.2 (C) 2000-2008 MPlayer Team
CPU: Intel(R) Pentium(R) M processor 1700MHz (Family: 6, Model: 9, Stepping:
5)
CPUflags:  MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled for x86 CPU with extensions: MMX MMX2 SSE SSE2
Config pushed level is now 2
Config pushed level is now 3
get_path('codecs.conf') ->
'C:/MPlayer-p4-svn-25803/mplayer/codecs.conf'
Reading C:/MPlayer-p4-svn-25803/mplayer/codecs.conf: Can't open
'C:/MPlayer-p4-svn-25803/mplayer/codecs.conf': No such file or
directory
Reading /usr/etc/mplayer/codecs.conf: Can't open
'/usr/etc/mplayer/codecs.conf': No such file or directory
Using built-in default codecs.conf.
Configuration: --prefix=/usr --enable-static --enable-md5sum --enable-menu
--disable-vidix-internal --disable-sdl --enable-caca --enable-gl
--enable-freetype --enable-png --enable-jpeg --enable-gif --enable-tga
--enable-mad --enable-tv --disable-dvb --disable-dvbhead
--with-extraincdir=/c/Work/mplayer/live --enable-matrixview
--enable-color-console --flavor=p4
CommandLine: '-demuxer' 'lavf' '-lavfdopts' 'cryptokey=xxxxxxxxxxxxxxxxxxxxx
' 'mmshttp://stream.onet.pl/tvn24_video' '-v' '-v'
init_freetype
get_path('font/font.desc') ->
'C:/MPlayer-p4-svn-25803/mplayer/font/font.desc'
font: can't open file:
C:/MPlayer-p4-svn-25803/mplayer/font/font.desc
font: can't open file: /usr/share/mplayer/font/font.desc
Using MMX (with tiny bit MMX2) Optimized OnScreenDisplay
get_path('fonts') -> 'C:/MPlayer-p4-svn-25803/mplayer/fonts'
Using Windows native timing
get_path('input.conf') ->
'C:/MPlayer-p4-svn-25803/mplayer/input.conf'
Parsing input config file
C:/MPlayer-p4-svn-25803/mplayer/input.conf
Input config file C:/MPlayer-p4-svn-25803/mplayer/input.conf
parsed: 83 binds
get_path('tvn24_video.conf') ->
'C:/MPlayer-p4-svn-25803/mplayer/tvn24_video.conf'