Question about "Fading Grid"

I’m fairly new to Flash, but somehow I managed to get the Fading Grid thingy to work with a pic of my own choice. But now my problem is, that when I load it onto my html, it does not have a transparent background. Meaning, when it loads it was supposed to start as a blank file and then become a full picture as the squares progress. Hoe do I make it transparent? I have tried this tag
<param name=“wmode” value=“transparent”, but it didn’t do the trick.
Is there a way around that problem?