binding a flash movie to a server-side variable

[CurlyFro]

i'm trying to bind a flash component movie to a dynamic source. GetFlashUrl
can return http://www.mydomain.com/flash.swf or
http://www.mydomain.com/flash.swf?var1=var1&var2=var2 but my server-side
property doesn't even get processed. why not?

<object classid="clsid27CDB6E-AE6D-11cf-96B8-444553540000"
codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0" width="240" height="245">
<param name="movie" value='<%# GetFlashUrl() %>'>
<param name="quality" value="high">
<embed src='<%# GetFlashUrl() %>' quality="high"
pluginspage="http://www.macromedia.com/go/getflashplayer"
type="application/x-shockwave-flash" width="240" height="245"></embed>
</object>