Rtmp streaming doesn't work on Mac OS system

Hi all,

i try to play video on Mac OS system using the standard embed code:

<object height="409" width="600">
<param name="movie"
value="http://fpdownload.adobe.com/strobe/FlashMediaPlayback.swf" />
<param name="flashvars"
value="src=rtmp%3A%2F%2Fmy-server%2Fvod%2Fflv%3Amy-video
poster=http%3A%2F%2Fosmf.org%2Fimages%2Fposter_cathy_fmp.jpg" />
<param name="allowFullScreen" value="true" />
<param name="allowscriptaccess" value="always" />
<embed allowfullscreen="true" allowscriptaccess="always"
flashvars="src=rtmp%3A%2F%2Fmy-server%2Fvod%2Fflv%3Amy-video
poster=http%3A%2F%2Fosmf.org%2Fimages%2Fposter_cathy_fmp.jpg" height="409"
src="http://fpdownload.adobe.com/strobe/FlashMediaPlayback.swf"
type="application/x-shockwave-flash" width="600">
</embed>
</object>

on Safari and Firefox but it doesn't work!!!

Does anyone know why?

Is it a FSM problem or Flash Player problem?

Thanks in advance