swf files does not show in firefox

[davidliudewen]

hi, dear

i have the following code fragment:

<div style="margin-left: -15px; margin-right: 30px;">
<embed height="400" width="695" type="application/x-shockwave-flash" src="demo.swf" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="elcHomeDom1=1.flv&amp;elcHomeDom2=MojaveOverNoVol.swf" menu="true" loop="true">
</embed>
</div>

it works fine i IE , but the flash does not show in firefox.
what is more weird, in the development server , those codes works in firefox, but in production server , those codes dose not work in firefox .

can any one help.
thanks

[davidliudewen]

have anyone encoutered this before?